Diesel Extreme

Rated 4.90 out of 5 based on 62 customer ratings
(100 customer reviews)

$11.95$222.95

SAVE 10%: Buy multiples of (6) 2QT or 1 GAL OR (12) 1QT or 16OZ.

FREE SHIPPING on every order (Contiguous US)

FREE with ALL orders Limited time! Every order over $35 receives a FREE 32 oz bottle of Stiction Eliminator $32 Value.

international-iconNow shipping to USA, Canada, Australia

Restore Your Original Performance Power!

Restores throttle response
Eliminates black smoke & improves cold starting
Reduces DPF regeneration cycles up to 50%
Cleans injector tips, cylinders, fuel lines & tank
Increases mileage & eliminates stiction from the fuel system

Recommended for ALL diesel engines. NOT for use in gasoline vehicles.

TREATMENT RATIO
4 OZ / 10 GAL
8 OZ / 20 GAL
32 OZ / 80 GAL
Clear
SKU: P0404

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4.9 out of 5 stars

100 reviews

Let us know what you think...

What others are saying

  1. Todd LaMantia

    Diesel additive

    Todd LaMantia

    This is the only additive I will use, its easy and makes a difference in performance that you can actually feel in your trucks performance

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  2. Brandon

    Question

    Brandon

    If I have a half tank of fuel in my 7.3 with power service anti gel, can I fill the tank and put the diesel extreme in without hurting anything? Have a 250 mile trip tomorrow and want to run the diesel extreme.

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    • Levi

      Levi (verified owner)

      Usually we recommend not mixing additives, but in this case you are perfectly safe. PS Next time give our Anti-Gel a try…thanks Brandon!

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  3. Steve Waclo

    4 out of 5 '03 Duramax, LB7

    Steve Waclo (verified owner)

    When these engines begin to smoke at idle, it’s what police call a “clue” and time for new injectors. Mine is smoking on the second set at 155k and a variety of products, including GM injector cleaner several times, have had minimal effect. Diesel Extreme is my final effort to avoid a multi-thousand dollar repair and it’s hard to be optimistic. Half a gallon of product so far and smoke at idle continues…Hard to guess at a star rating but I’ll go with 4, since I don’t want to lower the rating for a problem that no product is likely to fix.

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  4. Duane Shaw

    Question

    Duane Shaw

    I have a exhaust particulate filter warning on my 2010 BMW X5 Diesel. Which product will best help maintain or clean that filter. The vehicle has 100k miles and is well maintained over the years. I have never used an additive in the past.

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    • Levi

      Levi (verified owner)

      Hi Duane, the combination of Diesel Extreme to initially clean and EDT for every tank after that, has been proven to reduce regen cycles by up to 50%!

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  5. Chris Garner

    Question

    Chris Garner

    I am looking to buy a 2006 cummins 5.9 and on the test drive I notice a little rough idle and when I pulled of the parking lot white smoke was coming out of the exhaust but it cleared up after driving it.What do you recommend

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    • Levi

      Levi (verified owner)

      Hi Chris, especially since the smoke cleared up, you are definitely on the right track with Diesel Extreme…thanks!

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  6. Terry Lape

    Question

    Terry Lape

    Does Diesel Extreme contain alcohol?

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    • Richard Altans

      Richard Altans

      Question – Is this recommended for Boat Diesel?

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    • Levi

      Levi (verified owner)

      Yes absolutely Richard!

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    • Levi

      Levi (verified owner)

      No it does not, thanks!

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  7. dennis33

    5 out of 5 Running Smooth!

    dennis33 (verified owner)

    Added Diesel Extreme to a full tank on my 2005 6.0 Powerstroke. Easier starting, smooth idle, can recommend this product!

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  8. Douglas Dikun

    Question

    Douglas Dikun

    I remember reading somewhere, that one of your products is very beneficial to stroke engines. I have a chainsaw that seems to be getting gummed up. A little marvel mystery oil in the fuel oil mix has helped but doesn’t last past the next fuel up.
    #2 when will the FR3 be back in stock?

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    • Levi

      Levi (verified owner)

      FR3 Friction Reducer is a good product to start with, it is fully back in stock now Douglas!

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  9. Ben

    Question

    Ben

    How would this work in a 2004 Cummins for cleaning injectiors?

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    • Levi

      Levi (verified owner)

      We guarantee it will clean the injectors in your Cummins, or your money back!

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  10. Thomas Gwin

    5 out of 5 Great product

    Thomas Gwin

    I’ve been using this product in my Pete 387 since pilot/flying j started carrying it. Now I use it in my 16 duramax and farm tractors as well, it’s always been a great product and best bang for your buck

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  11. Daran Mercury

    Question

    Daran Mercury

    Two questions:
    1. How long is an opened bottle of Diesel Extreme good for?
    2. Is Diesel Extreme compatibly with Propel HPR renewable diesel?

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    • Levi

      Levi (verified owner)

      Typically, we’d recommend using our products within 4-5 years. Yes it is definitely compatible with Propel HPR renewable diesel!

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  12. Timothy Smith

    Question

    Timothy Smith

    Who this product be recommended for Peterbilts (Sleepers) as well?

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    • Levi

      Levi (verified owner)

      Yes absolutely!

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  13. Chuck Wideen

    Just as advertised

    Chuck Wideen (verified owner)

    On my first trip out after adding Diesel Extreme I could feel the performance difference. My Cat 350 is running so smoothly. The mileage in my motorhome actually went up by 1.5 mpg, even over a stretch that usually produces very poor mileage. I will be adding the Stiction Eliminator on my next oil change.

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  14. Michael Arreola

    4 out of 5 Good stuff

    Michael Arreola (verified owner)

    Been using this product for the last year and really like this product going to start using EDT keep making this thanks

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  15. Christopher

    DTS code killer!

    Christopher (verified owner)

    On my duramax 06 lbz the egr code would come up every so often without additives so I’d run 30 dollars or so of other additives to get it to clear out codes. That’s about 3 tanks of fuel but with the diesel extreme used as recommended and it cleared codes almost right away and hasn’t been back. The truck is running smoother than ever. I’m going use the other hotshot products and see how they work.

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  16. Ben Day

    5 out of 5 Runs good

    Ben Day (verified owner)

    I add this preventatively every oil change, haven’t had any problems.

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  17. Paul

    Question

    Paul

    My fuel and filter are turning green. can your product clean this up.

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    • Levi

      Levi (verified owner)

      Hi Paul it is definitely worth a try. This is at least twice as strong as the next best fuel additive on the market. If it doesn’t work, we will give you you’re money back, and at that point give us a call to ask about our Microbicide specialty product, thanks!

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  18. Chris Karlin

    5 out of 5

    Chris Karlin (verified owner)

    I trust that Diesel Extreme is great. I didn’t notice much difference when I first used it but I will continue using it every 6,000 miles on my deleted/tuned 2011 BMW 335d. The product that I have truly noticed a huge difference from is EDT which reduced my black smoke by about 90%. It reduced how often it smokes and the opacity of the smoke. I will keep using Diesel Extreme and EDT for sure!

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  19. Michael

    5 out of 5 VW Jetta with 210,00 miles

    Michael (verified owner)

    Have used Power Service products in the past. This has reduced black smoke and has increased my milage. Currently using EDT and will be using Stiction Eliminator with my next oil change.

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  20. keith reimer

    352,000 miles and still running strong

    keith reimer (verified owner)

    I was referred to this product many years ago while I resided in California. Since using this Diesel extreme my truck has better mileage, better power and has contributed to the life and longevity on my F-250 6.0 motor. Love this stuff.

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  21. Daniel Wold

    5 out of 5

    Daniel Wold

    prior to using this product, my 2004 6.0L would sound like a 7.3 L on the cold days. now i run it one oil change a year, the cold months.

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  22. Jerry

    5 out of 5 Reduced black smoke

    Jerry (verified owner)

    All in one injectior cleaner ,fuel system cleaner.. you will see a different in response and mileage after use .has a moisture dispersant to get the water out of the tank .Does what it’s supposed to

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  23. James

    Question

    James

    Hi I have a 2000 f250 with the 7.3l and it has just almost hit 300,000 miles on it and is very sluggish and low power. I had an oil leak and changed the egr valve and no more leak.. so I got the oil treatment and the fuel additive and the fr3 I think.. but I know the fuel is for every 6k miles but how much and how often do I use the other fuel treatment.. fr3 I think.. I have a 34gal tank

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    • Levi

      Levi (verified owner)

      Hi James, the other fuel additive I think you’re referring to is EDT Everyday Diesel Treatment. It is to be used every fill-up, thanks!

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  24. Trenton Russey

    How much is safe in one use

    Trenton Russey

    I️ was wondering how much I could use in one use. With diesel Kleen I️ could use the whole bottle is that the same with your diesel extreme?

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    • Levi

      Levi (verified owner)

      Hi Trenton, it really depends on the size bottle and fuel tank. For example a 16 ounce bottle treats 40 gallons but is safe to treat 30-40 gallons roughly. The best results are not over-dosing, but back-to-back treatments when necessary. Hope that helps!

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  25. wayland

    5 out of 5 wayland

    wayland (verified owner)

    used on Kubota tractor. no more black smoke. more power.

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  26. John Clark

    5 out of 5 Improved Mileage

    John Clark (verified owner)

    Have 2002 F350 7.3 diesel with 115,000 miles. Towed 4 horse goose neck trailer with 2 horses from CA to NM and back. After using this product for the first time mileage improved from around 13mpg to over 15mpg while towing.

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  27. Chris

    Question

    Chris

    Does this work well when temps are below freezing?

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    • Levi

      Levi (verified owner)

      Yes, in addition to the Diesel Winter Anti-Gel (it will help with other adverse affects such as asphaltines and Internal Diesel Injector Deposits (IDIDs).

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  28. 86chevy

    Question

    86chevy

    I own a 86 Chevy cucv with a 6.2 diesel I keep getting told to put additives in the fuel for lubricants , and add cetain and surfer boost as that’s when the motor was built to run on what products should I run I’m putting 911 in the tank every so often but I’m not completely sure what is the best thing for it , it is also a NA naturally aspirated diesel non turbo if that helps

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    • Levi

      Levi (verified owner)

      Hello! You are definitely on the right track with using the Diesel Extreme first, followed by our EDT fuel additive every tank to help with lubricity and cetane boost! Also, with that age of engine, it is worth using the Stiction Eliminator to clean out everything in the entire oil system…thanks!

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  29. Grant Hickman

    Question

    Grant Hickman

    I have a 2016 Ram 6.7l with 27,500 miles. I have used Royal Purple from the first oil change. I wanted to start the preventative measures now. I have started with the Diesel Extreme, EDT and now with my oil change the Stiction Eliminater. Will I be able to see or tell much affects from these products?

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    • Levi

      Levi (verified owner)

      Hi Grant, with that few miles you are on the right track with preventative maintenance, and should see a difference with Diesel Extreme and reduced regen. cycles. Also, most likely the EDT depending on the quality of fuel in your area.

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  30. Scott

    Question

    Scott

    06 f350 with delayed Turbo spool up…..what might help??

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    • Levi

      Levi (verified owner)

      Hi Scott, the Stiction Eliminator is the product to directly help restore any turbo issues, thanks!

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  31. Bobby

    5 out of 5 Diesel Extreme

    Bobby (verified owner)

    This product is fabulous, started using last year in VW and Ford Diesels, A1 product , no start issues or fuel issues what so ever

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  32. Jake

    First use

    Jake (verified owner)

    Added as an additive for maintenance will see how it treats me. Also got some anti-gel as it’s starting to get cold in Wisconsin! Thanks fellas!

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  33. Todd E

    5 out of 5 Diesel extreme

    Todd E (verified owner)

    I have a 2003 f250 with a 7.3 power stroke has 268k miles it began to idle a little rough so I added the extreme diesel to fuel 10 oz to 25 gal at around 300 miles I noticed it had smoothed out ! No more rough idiling !! Very happy with your product

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  34. Dick E

    5 out of 5 HUMVEE 1986 6.5l

    Dick E

    Engine was missing and slapping with White smoke just started out of the blue a few weeks ago. I ordered the diesel extreme, I added to fuel per instructions, ran it for 10 minutes at idle and shut it off. 2 days later I figured I would troubleshoot one last time before disassembling and was happy to say the problem was gone when I fired her up. Still running great

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  35. Cliff G.

    Holy toledo

    Cliff G.

    I had a starting problem with the fuel system, low pressure, low idle, and low boost on my 2004 f250 6.0, friends told me about this stuff and for two years I had not bought it. Today I did and I drove it for about an hour after adding 32 ounces to the oil and 12 ounces to the fuel, had about 15 gal in the tank. When I started it I had the same problem with starting and low Idle, took it for another ride and holy toledo I had increased boost and acceleration. When I got back the starting problems went away idles great. You saved me from being raped by a dealership…..Thanks

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  36. Brian

    First use of Diesel Extreme

    Brian

    I just put in my first dose of Diesel Extreme in my ’05 F250 6.0 and went a little heavy by mistake (probably .8qt instead of .5qt), will this hurt anything?

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    • Levi

      Levi (verified owner)

      Nope you are still on the safe-side with the dosage you listed; thanks and keep us posted!

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  37. Jack

    12K Miles per month @ 8.5 MPG

    Jack (verified owner)

    Diesel Extreme

    Photo has been removed

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  38. George Cura

    5 out of 5 Injector Care

    George Cura (verified owner)

    I was impressed the Oil Stiction Eliminator that I had to try the Diesel Extreme. The performance is back. Light throttle on maintaining speeds and very little black smoke on acceleration. Great products, you won’t be disappointed.

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  39. john

    How to use this product..

    john (verified owner)

    I have a 2002 F350 Super Duty with the 7.3 engine and 115K miles. Just purchased you diesel extreme fuel treatment product. Assume I should put this additive in before filling the tank so it can mix? How often should I use this product? I also read a review that someones fuel filter was black after using your product. I just changed my fuel filter do I need to change more frequently?

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    • Levi

      Levi (verified owner)

      Yes, please add right before filling (ideally near-empty tank). It is recommended every 6 months/6,000 miles; and it is possible you would need to at least check the fuel filter only after the initial treatment…thanks!

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  40. MIKE JOHNSON

    Question

    MIKE JOHNSON

    I have a 34gal tank on my one ton will 16oz be to much first time using do I do the 2to 3 back to back is it one time deal and use 16oz every 6months I am going to get the oil treatment and the EDT ps. 07duramax3500 131000 miles black smoke on ile and taking off hard

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    • Levi

      Levi (verified owner)

      16 oz is fine, also 2-3 back to back, followed by 16 oz every 6 months. Both oil and fuel additives will help the symptoms you mentioned, or your money-back!

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  41. Doug Dikun

    Question

    Doug Dikun

    If starting with a clean system, or coming off a diesel extreme treatment. And then a steady diet of EDT, why the need to retreat with diesel extreme? Thanks ,doug

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    • Levi

      Levi (verified owner)

      Hi Doug, it is a similar analogy to brushing your teeth daily (EDT), but still going to the dentist every 6 months (Diesel Extreme) for a deep clean…hope that makes sense!

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  42. John T.

    Question

    John T.

    Will your diesel fuel additive react with any other products from other brands such as Lucas or Cerma?

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    • Levi

      Levi (verified owner)

      It is unlikely that it will react negatively, HOWEVER, we do not recommend mixing fuel additives (including our own), thanks!

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  43. Todd

    5 out of 5 Diesel Extreme

    Todd (verified owner)

    Ran the diesel extreme through my truck and changed the fuel filters at same time WOW. Did it clean out my fuel system. Less than 1000 miles I ran out the last of diesel extreme and pulled my fuel filters they were coal black. I have 305,000 miles on my truck and have never seen my filters that dirty and they are usually only changed every 10,000 miles. So I know that it really cleaned my entire fuel system will definitely be using Diesel Extreme again.

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  44. kenna

    Noticeable Difference

    kenna (verified owner)

    Emissions definitely reduced. Diesel consumption unchanged in some applications. Would recommend.

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  45. Randy Rink

    5 out of 5 Your products worked nicely on my New Holland turbo skid steer loader.

    Randy Rink (verified owner)

    I used Diesel Extreme in the fuel and Stiction eliminator in the synthetic oil and it solved the stumbling at startup at the very first turn of the key. I am no longer worried about winter start-up, Thanks

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  46. Lyle

    Question

    Lyle (verified owner)

    I have an 02 lb7 duramax with the amazing injector problem. Just bought the diesel extreme. Will this help eliminate my white smoke issue. Smokes during idle. Smokes while in drive and smokes on take off. Some days smoke more than others. Will this help and how many treatments will I need to do before I get these notorious lb7 injectors restored?

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    • Lyle

      Lyle (verified owner)

      Ok thank you Levi I will give it a try and see how she runs the next few weeks thank you.

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    • Levi

      Levi (verified owner)

      Hi Lyle, yes the Diesel Extreme is the product to use! Simply use the recommended treatment in 2 or 3 back-to-back fill-ups and it will restore the injectors (or your money-back!)

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  47. Joe Sylvester

    Question

    Joe Sylvester (verified owner)

    I have a semiclogged diesel injector, can I add extra to the first 12ounces Im putting into the full tank to make it work faster or will that hurt something??I changed the EGR valve as it did have alot of carbon on it.

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    • Levi

      Levi (verified owner)

      Hi Joe, it won’t hurt but it will be more beneficial to use the recommended treatment in 2 or 3 back-to-back fill-ups vs. a higher concentration per tank. Keep us posted!

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  48. Pat M

    Question

    Pat M

    Have a large class 8 heavy duty fleet, mostly Mack engines, with some Cummins new and old. Are there any issues of voiding manufacturer warranties.

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    • Levi

      Levi (verified owner)

      Hi Pat, no there are no chances of voiding warranties. In fact, a major engine manufacturer has essentially admitted the necessity of fuel additives recently. Please see “Magnuson–Moss Warranty Act” for more information, thanks!

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  49. Chris Grabow

    5 out of 5 This Product ROCKS

    Chris Grabow

    Used your extreme additive and injector cleaner and let me says with in 1 and 1/2 hours I’ve noticed cleaner idle and a definite power increase everyone has told me to start in second first gear was so dogish second wasn’t much better I bought a used 6.0 with a 6speed I can tell a difference thank you! Any other recommendations?

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  50. Tom M

    5 out of 5 Diesel extreme

    Tom M (verified owner)

    I like this product. I was have a fuel problem every time I pulled a trailer. The warning light would come on and reduce power on my 2008 Chevy dully. I have a Duromac diesel and I continued to fight the problem of changing the fuel filter. The last time it happened I had about 200 miles on a new filter. After checking with a Diesel mechanic he said I would need new injectors at a price of about $7,000. Then I went on line to see what the injectors would cost and do the job myself, that when I saw your ad for diesel extreme and thought I would try your product prior to changing injectors. I’m seeing a major change in the performance of my truck not to mention an increase in mpg. Your price is a lot cheaper than changing injectors. I mentioned your product to a friend and he stated he has already been using this product and doesn’t have any problems with fuel filters and doesn’t pull any maintenance until after 3000 miles and he also pulls trailers. I just purchased your EDT to add in my fuel.

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  51. Octavio

    Question

    Octavio

    I have a 1996 n-14 celect plus cummins, it gets the shivers at idle and seems to have an injector getting stuck and a little bit of white smoke at idle. Could the diesel extreme possibly fix a sticking injector??

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    • Levi

      Levi (verified owner)

      Yes absolutely, if it doesn’t we’ll give you your money back!

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  52. Sean Jeffries

    Exellent Product!

    Sean Jeffries (verified owner)

    This made my engine run smoother and better. Will recommend to anyone.

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  53. Kurt

    Question

    Kurt

    Will this harm an Airbog lift pump?

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    • Levi

      Levi (verified owner)

      If you are referring to an *Airdog pump, no, it will not have any harmful effects, Kurt!

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  54. Jimi w

    Question

    Jimi w

    I have a 2016 ram 1500 ecodiesel with 9456 miles. I just want to keep it clean and running good. Will this help with that. I’m a big fan of Lucas brand. I use the Lucas injector cleaner and upper cylinder lubrication .can I use this about 4 times a year with Lucas to help keep it running good and clean. With no problems with the particular filters . Thank you, jim

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    • Brandon

      Brandon

      one more question. When using the stiction eliminator in a 94 7.3 do I leave some of the oil out to counter the 64oz of eliminator? Thanks

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    • Levi

      Levi (verified owner)

      Yes, please replace 64 oz/ 2 quarts of oil when using Stiction Eliminator…thanks!

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    • Brandon

      Brandon

      So I can use this stuff on my 1994 7.3 idi? All of the products

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    • Levi

      Levi (verified owner)

      Yes absolutely, Brandon! All products…

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    • Levi

      Levi (verified owner)

      Hi Jim, yes the Diesel Extreme 4 times a year will be a great regimen for the EcoDiesel. Just don’t use in the same tank as Lucas, or mix additives in general.

      Also, we think you’ll love our EDT (Everyday Diesel Treatment) fuel additive in between treatments of Diesel Extreme!

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  55. Jason

    4 out of 5 Works great

    Jason (verified owner)

    Seemes to improve throttle response

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  56. Mike

    Question

    Mike

    Hvea mis at1500 rpm then goes way all read did the oir deffant different now i want to ad the fuel extreme will it help i would like to put it in the filter then the tank

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    • Levi

      Levi (verified owner)

      Yes it will definitely help if it’s an intermittent miss! What type of vehicle/engine?

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  57. Steve

    Question

    Steve

    Cost aside, any harm in running your Diesel Extreme 16oz per every 30-35 gallon tankful , instead of using your EDT? The reason is I’ve got a new- used 2006 Cummins that has had its injectors and fuel neglected, and I want to drop the proverbial hammer on potential injector problems and eliminate excessive small amounts black smoke coming out of pipe upon acceleration.

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    • Levi

      Levi (verified owner)

      Hi Steve, we don’t recommend using the full dose for more than 2-3 tankfuls every 6 months/6,000 miles. If you do want to use Diesel Extreme every tank, only 1-2 ounces is necessary, thanks!

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  58. Jeffrey

    5 out of 5 Quick start and smooth, I am sold on Diesel Extreme

    Jeffrey (verified owner)

    95000 miles on my Cat 3126B when I bought it and the previous owner never added anything, it had been sitting for almost a year when I bought it, it was starting hard, idle RPM was surging from 720 to 770, someone told me to try Diesel Extreme so I did, within a couple hundred miles it was getting better, after 2 tankfuls about 1200 miles it now starts good, runs smooth and idles at 750 plus or minus 5 rpm. I am now about 2000 miles into the Stiction Eliminator and it sounds smother, no smoke. I am very happy with both of these products.

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  59. Marschal

    5 out of 5 Love this product

    Marschal

    It really works

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  60. Seth

    5 out of 5 Helped rough idle and fuel mileage a lot!

    Seth (verified owner)

    This is a great product what ever you guys are doing is like magic in a bottle fuel mileage dramatically increased and my egts are staying quite low are using this product! Great great product

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  61. Jose feliciano

    Question

    Jose feliciano

    I have a 03 f250 with a 6.0 and I added your fuel cleaner and after only 40 miles of driving the started smoking and just shut down. Truck ran good just added for maintenance to keep it that way. Any suggestions.

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    • Levi

      Levi (verified owner)

      Hi Jose, please give us a call to speak with one of our diesel technicians: 1-800-341-6516

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  62. Steven Barousse

    Question

    Steven Barousse

    Will this remove fungus algea and stuff in full storage tanks?

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    • Levi

      Levi (verified owner)

      Hi Steven, no it does not. It does prevent fungus and algae via the moisture dispersant. Please give us a call at 800-341-6516 to buy a product called MP8 Microbicide, thanks!

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  63. david

    Question

    david

    will diesel extreme help clean 6.4 fuel system

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    • Levi

      Levi (verified owner)

      Yes absolutely, or your money-back!

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  64. Gabe Adair

    Question

    Gabe Adair

    Can you “over use” diesel extreme?

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    • Levi

      Levi (verified owner)

      Hello Gabe, while we have heard a handful of extreme cases of too much per tank, we recommend sticking with the dosage rate per gallon, and 2 tank-fulls max every 6 months/6,000 miles. Do you have a concern in particular?

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  65. Cody

    Cody (verified owner)

    Update: I was contacted today regarding the leaking bottles. I was assured that there was an issue with the bottle seals from the manufacturer, I was assured the problem will no longer be an issue. The customer service is pretty good and quickly reached out to resolve the issue.

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  66. Seth

    Question

    Seth

    My fuel mileage dropped severely in my 7.3 indirect injection from 17 to 10 mpg will this help?

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    • Levi

      Levi (verified owner)

      Hi Seth, while we hesitate to guarantee any specific MPG restoration, it is highly likely that the Diesel Extreme, followed by the EDT fuel additive will help! We do honor our money-back satisfaction-guarantee if you are not impressed; just be sure keep the receipt!

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  67. Debra m.

    Question

    Debra m.

    hey, i have a 1997 ford F350 diesel truck and was wondering is the diesel extreme will mess my truck up in any way or if there will be and cons while adding the diesel extreme?

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    • Levi

      Levi (verified owner)

      Hello Debra, there is no chance of the Diesel Extreme messing up the truck by itself. Please follow the recommended dosage and treatment intervals, and let us know if you have any other questions or concerns!

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  68. Jay A.

    5 out of 5 Best diesel additive I've used

    Jay A. (verified owner)

    This stuff blows away all other diesel additives!

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  69. John

    Question

    John

    If I but Diesel Extreme in this fill up when would I add EDT. Thank you

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    • Levi

      Levi (verified owner)

      Hi John, on the next fill-up, and ideally every fill-up after until you are ready to use Diesel Extreme again for maintenance. Thanks!

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  70. John Ward

    Question

    John Ward

    I have a 2005 Dodge 2500 with a Cummins 5.9 engine. I have been using Moreys Diesel Quench for years with good results. It appears that it is no longer available in the USA. Do you have a comparable product that you can recommend?

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    • Levi

      Levi (verified owner)

      Hello and yes, John! I did some research, and first of all I see it is from the other Lubrication Specialties in California (no connection whatsoever). You should see better-than-comparable results as shown below!

      The first/main differentiator in Diesel Extreme to look for on an SDS sheet is 2-Ethylhexyl:
      Morey’s Diesel Quench: <10%
      - Hot Shot's Secret Diesel Extreme: 49%

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  71. Brendon

    Brendon

    Will this help level out my injector balance rates on my LLY Duramax? I also occasionally have a small puff of white smoke on cold start up, none while idling or driving though. Thanks in advance

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    • Jim

      Jim

      As a user of Diesel Extreme and Stiction Remover…. I have Two questions for you, 1) In regards to your reply above to “Brendon” and his LLY Duramax… you made the ending comment…” not the notorious LB7″…. what is the reasoning behind the comment, out of curiosity…. and 2) What is the safe (re: still useful) storage “Shelf Life” of Diesel Extreme & the Stiction Remover…. in a cool (but NOT Damp) semi-dark enviroment (re: basement with wood & steel framed storage racks)… with year round basement temps between 60 and 72 degrees?

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    • Levi

      Levi (verified owner)

      Hi Jim, that was referring to especially early model LB7s which are known for high injector failures and high replacement expense (relative to other non-HEUI injectors). Also, the shelf life is a few years, but please shake vigorously if using after months of storage, thanks!

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    • Levi

      Levi (verified owner)

      Hi Brendon, there is a great chance this will restore injector balance rates and eliminate the smoke! We guarantee it or your money back (especially since you specified LLY not the notorious LB7 😉

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  72. Robert Reilly

    Shocked at what happened

    Robert Reilly (verified owner)

    I didn’t think my injectors were dirty but i ran the diesel extreme anyway and i was shocked by the change it made, my engine started to run smoother and i had to change injection timing due to the fact i was getting more fuel injected than before! I highly recommend diesel extreme!

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    • Robert Reilly

      Robert Reilly (verified owner)

      5 stars

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  73. Thomas

    Question

    Thomas

    Is this safe to use in emissions controlled fords? Is your oil aditiive also safe?

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    • Levi

      Levi (verified owner)

      Yes they are both completely safe. In fact, we’ve seen test results that Diesel Extreme reduces regen. cycles by up to 50%!

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  74. Michael Pruitt

    5 out of 5 Diesel Extreme

    Michael Pruitt (verified owner)

    One of the best additives out there! makes my Duramax run better

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  75. francis booths

    diesel extreme

    francis booths (verified owner)

    great product

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    • Frank

      Frank

      Put it in and not sure how long it takes to work. Any suggestions.

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    • Levi

      Levi (verified owner)

      Hi Frank, do you have any updates? You should see results in the first few tank-fulls after adding.

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  76. John

    Owner/Manager

    John

    This is the first I have heard willing to try and log results will comment afterwards

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    • Levi

      Levi (verified owner)

      Thanks, keep us posted!

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  77. Chayes

    Question

    Chayes

    I have 04 Chevy Duramax Diesel will this help with white smoke?

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    • Levi

      Levi (verified owner)

      Yes it is definitely worth a try if it is not excessive white smoke, or if the oil level is not rising over time. If it doesn’t help, we’ll refund your money!

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  78. George

    Question

    George

    I put diesel extreme in my gasoline truck and it runs great. Have I screwed my truck engine up?

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    • Jim

      Jim

      Levi… In regards to your response to George (DE in gasoline)…. you were explaining the difference between Cetane & Octane (flame front retardation)….. would it be correct to understand that the Higher the (pump) Octane rating (ie: 91-vs- 87) the Slower the flame front during the burn period?…… which would be advantageous in higher cr engines with, say… 10:1 or higher cr’s ?

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    • Levi

      Levi (verified owner)

      Hello Jim! Thank you for all the detailed questions and concerns. I think it would be easier for both of us if you don’t mind calling in to talk to one of our diesel technicians: 1-800-341-6516, thanks!!
      Levi R. | Senior Web Developer & Analyst

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    • Levi

      Levi (verified owner)

      Not necessarily George, BUT, you should fill up the tank whenever it gets down low enough to add 4 or 5 gallons of gasoline to dilute the Diesel Extreme. Also, don’t drive the truck aggressively until the Diesel Extreme is gone.  Diesel Extreme boosts cetane which is just the opposite of what a gas engine needs (octane).  Cetane speeds up the burn and octane slows down the burn.  With Diesel Extreme in the tank you may get hard starting when engine is warm and get spark knock.

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  79. Eric

    Question

    Eric

    are there UK Distributors if yes , please provide contact details
    Thanks.

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    • Levi

      Levi (verified owner)

      Hello Eric. We do not have any official UK Distributors at the moment. The best way to buy Diesel Extreme internationally is through our official eBay store: http://stores.ebay.com/hotshotsecret

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  80. mike ferrara

    Question

    mike ferrara

    hello i am buying a boat that has 400 gallons of 8yr old diesel fuel in it .how much and will it take to work on this much fuel?

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    • Wesley

      Wesley

      Does Diesel Extreme work well in the new ram echodiesel?

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    • Levi

      Levi (verified owner)

      Yes absolutely! We’ve had great results and there are some YouTube testimonials related to the EcoDiesel.

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    • Levi

      Levi (verified owner)

      Mike,

      We would recommend you put in 5 quarts of Diesel Extreme.

      With it being 8-year-old diesel fuel, we cannot be sure 100% if it will make it like new.

      Please let us know if it does work.

      If it does not do what you want, we do offer a money back guarantee.

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  81. Kelly

    Question

    Kelly

    I’m a paramedic and we run Ford diesels. Since we have several units, they are all different year models. Is there anything I should be aware of, year model differeneces?. They are all 2010 and up. Is there any wholesale?

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    • Levi

      Levi (verified owner)

      Hello Kelly! With Diesel Extreme, there is really no specific year/make/model bias as long as it’s a diesel! The Stiction Eliminator is different as it will clean out the oil side of injectors in ’99-’07 Fords. We do recommend both products (the Diesel Duo) to see the best results, even in 2010 and newer Ford diesels.

      Online, there is a 10% discount when you buy multiples of (6) 2QT or 1 GAL OR (12) 1QT or 16OZ. Or, feel free to call 800-341-6516 to talk to an account executive!

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  82. Dale L.

    Question

    Dale L.

    Does it make any difference in the effectiveness of the treatment, if you drive a mix of city and highway for the whole tankful? ( light load, several days) Or is it better to hook on the trailer and pull it down the highway for the whole tankful? (Heavy load, one day)

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    • Levi

      Levi (verified owner)

      Hello Dale. The effectiveness of the treatment will not vary much with driving style for Diesel Extreme. The main difference is, the sooner the initial tank-full is run through the system, the sooner you will see the benefits…thanks!

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  83. GOLDEN TRANSPORT

    2014 ram promaster 2500 diesel 3.0 liter eng, can i use it, will it reduce my regens?

    GOLDEN TRANSPORT

    really need a product that will help stop or cease my dpf filter from getting plugged with soot – do you have something?

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    • Levi

      Levi (verified owner)

      Yes absolutely! You are on the right track with using Diesel Extreme every 6 months. It has been proven in 3rd part testing to reduce DPF regeneration cycles up to 50%! Full report here: http://cdn.hotshotsecret.com/wp-content/uploads/2016/04/LSI-08Freightliner_6.7L.pdf

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  84. ROBIN L TIGNOR

    Question

    ROBIN L TIGNOR

    I have 2011 6.7 F350 with 240k miles. I’ve been reading the reviews, noticed a lot of happy 6.0 & 7.3 owners! I didn’t see a single 6.7 review using the product “says something for the 6.7 :-)”, it’s ok to use in my 6.7, correct? The plan is to start with the Extreme then EDT.

    Photo has been removed

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    • Levi

      Levi (verified owner)

      Hi Robin. Yep, the 6.7L is a great motor! And you’re on the right track with Diesel Extreme every 6 months & EDT every fill-up. If your F350 doesn’t run like new, we’ll give you your money back!

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  85. Albert Segarra

    5 out of 5 12 F-250 Deleted & Tuned

    Albert Segarra (verified owner)

    I’ve been using Diesel Extreme for several oil changes now. I put 16oz in my fuel tank right before I fill up (after oil change). Great product together with stiction eliminator.

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  86. stan

    Question

    stan

    i have an issuz diesel & two Navistar diesel engine can I use it

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    • Levi

      Levi (verified owner)

      Absolutely! You can use Diesel Extreme in any diesel. Also with the Navistar if you are having injector issue, we recommend the Stiction Eliminator (it was created specifically for that engine).

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  87. Eric

    Question

    Eric

    What happens if you use the diesel extreme more then the recommended every 6k miles

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    • Spencer W.

      Spencer W. (verified owner)

      Diesel Extreme’s benefits are long lasting; using sooner than the recommended 6k miles/6 month intervals won’t provide enough additional benefit that it becomes cost effective to use more frequently than that. Our Everyday Diesel Treatment is formulated to be a more wallet friendly, maintenance level dose if you’re desiring everyday protection.

      If you’re experiencing a fuel system related issue then we typically recommend a few back to back doses until the problem is corrected. Thanks Eric!

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  88. David Peterson

    5 out of 5 Diesel Extreme goodness

    David Peterson

    I bought a 2000 F-350 with the Powerstroke 7.3L and only had 90K original miles. A buddy told me Hot Shots Secret was the cats meow so I started by running the Diesel Extreme in the tank to make sure the fuel system was clean. Using EDT on regular fill ups and currently running Stiction Eliminator in this oil change. After I run Stiction Eliminator in this oil cycle I will be using the FR3 product in my oil changes. I honestly don’t know how much this has helped my truck because I didn’t have it long before using the Hot Shot Secrets products but I am sure they have helped. Gives me with a warm fuzzy feeling knowing I am doing what I can to keep my diesel a trucking for many more miles down the road.

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    • Levi

      Levi (verified owner)

      Thanks for the review David! Keep us posted when you get to 500k miles 🙂

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  89. C Arter

    5 out of 5 Diesel Extreme

    C Arter

    I have a 2003 Ford F-550, 6.0 liter engine with 136,000 miles. Acceleration has been a bit sluggish so I thought I’d try Hot Shots products before changing out injectors. I know according to Fords plug in computer I had a few that were recommended changed. I put about half the 32oz in the fuel tank with about 30/35 gallons of fuel. After driving about 50 miles pulling my 48 foot living quarter car hauler, I noticed better throttle response! Can’t wait to put their oil additive in during the next oil change.

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  90. Kevin

    What to do with a new 2017 F350, 7.2 to help it see 500k miles +, it only has 1500 miles on it now.

    Kevin

    Would like to know about it and schedule for new truck.

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    • Spencer W.

      Spencer W. (verified owner)

      Congratulations on your new truck! You’ve come to the right place! I would recommend our Everyday Diesel Treatment to keep the fuel system in original condition. EDT addresses fuel quality issues like moisture, low cetane, and prevents corrosion. We’ve also seen great benefits on newer trucks that had regens and DPF issues be completely fixed by EDT, so the smooth burn from the high quality fuel is definitely appreciated by the emissions system. When Lavon from Firepunk Diesel tested EDT in a 2016 Ram, the truck saw a dyno-proven 11 horsepower increase from a few ounces of our EDT, so even new trucks can appreciate the higher quality fuel. You’ll get peace of mind and fuel system longevity all for just a few cents per gallon. 1-2 ounces will treat most truck’s fuel tanks. After you get a few thousand miles on the truck, I’d start working a dose of Diesel Extreme in once or twice a year.

      Our FR3 would by my recommendation for the oil side. FR3 has been proven to reduce wear over untreated Shell Rotella by 43%, which equates to longer engine life. FR3 will help keep the engine from “getting tired” as you put the miles on her.

      Our products will not affect your warranty and we have money back guarantees on every Hot Shot’s Secret product, let us know if you have any more questions, thanks!

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  91. Dan Ertz

    5 out of 5 Great product

    Dan Ertz (verified owner)

    I’ve treated my fuel only once with Diesel Extreme and I noticed my highway MPG is 25+. I just bought a 2007 Dodge 2500 4×4 Cummins with 128,000 miles. If this is going to be typical highway mileage for this truck I’m extremely happy. Purchased the EDT a week ago. Can’t wait to see what kind of results I will get with it.

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    • Levi

      Levi (verified owner)

      Thanks Dan, keep us posted!

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  92. Chris Campbell

    Injector eating LB7's Best friend

    Chris Campbell

    On My 3rd. set of injectors, (250k Miles), live in California so get the crap diesel. Started to smell raw diesel and see the light puffs of black smoke out the exhaust at idle (again), didn’t wait this time, stopped at a Pilot truck stop added about 1-2 cups to an already full tank. Drove about 30 miles home, got out No smoke, No smell, trucks idle was noticeably much smoother WOW!! I am sold.
    Been using Opti-Lube no were near the same results. I ordered the 16 oz. Everyday treatment from Amazon. Will be using on the GMC and the 2014 3500 Ram…
    In all honesty I don’t know what would happen if I waited a few more hundred miles or so until the white smoke started, would I have got the same results? (HA! Don’t care, don’t have too) 🙂
    Very pleased.

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  93. Dean

    Question

    Dean

    Hi, at what mileage would you suggest using the Diesel Extreme and Stiction Eliminatior?

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    • Levi

      Levi (verified owner)

      Hi Dean, the Diesel Extreme can be used at any mileage and every 6K miles after. The Stiction Eliminator can be used as soon as 50K or closer to 80-90k for cost effectiveness.

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  94. Marc Winters

    5 out of 5 Diesel extreme

    Marc Winters (verified owner)

    Increased the drivability and toned down the smoking. I ordered some Stiction Eliminater to complete the process.

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  95. Marc

    Question

    Marc

    How does this stuff work with newer vehicles? I have a 2012 F350 Diesel with DEF. How does this affect my vehicle? Will it improve fuel economy too?

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    • Levi

      Levi (verified owner)

      Marc, Diesel Extreme works great with the newer diesels, reducing the DEF regens by up to 50%. You will likely see fuel economy gains the first tank or two, and continued use of EDT (Everyday Diesel Treatment) will improve mileage long-term…or your money-back!

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  96. Johnny

    5 out of 5

    Johnny (verified owner)

    very goood product i have put it in my truck and runs better i will definitely buy from you guys again

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  97. Mike Duncan

    4 out of 5 Diesel extreme

    Mike Duncan (verified owner)

    Product works as advertised my truck picked up better mpg and my balance rates are better

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  98. Jeff S.

    Question

    Jeff S.

    I cannot find EDT anywhere in the province of Ontario, but I can find Diesel Extreme at a local “Flying J” service station. Can I use Diesel Extreme in a limited dose on every fuel up? What can you recommend as a treatment schedule if I can use Diesel Extreme in this way.

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    • Levi

      Levi (verified owner)

      Hi Jeff. In this case we would recommend just a few ounces per fill-up, with the full dose as recommended every 6 months. Be sure to check for future EDT updates on our locator map! http://www.hotshotsecret.com/locations/

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  99. Levi

    Question

    Levi

    What do I use for diesel algae?

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    • Spencer W.

      Spencer W. (verified owner)

      Levi, give us a call at 1-800-341-6516 and we can help you out. We carry a biocide made by a company called Primrose; it is a very powerful product and we’ve always had good luck with it. Primrose is the only other additive manufacturer that we stand behind and carry. Get a hold of us and we can set you up with a plan. Thanks!

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  100. 5 stars,

    boat mec. & repair all.

    5 stars, (verified owner)

    diesel extreme is great. use it in my truck. & boats. 5 stars.

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  101. Michael

    4 out of 5 Good

    Michael (verified owner)

    It works good

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  102. Kevin McBride

    5 out of 5 So pleased with Stiction Eliminator had to try more.

    Kevin McBride (verified owner)

    I purchased Stiction Eliminator last year and so pleased I had to see what your other products were like. Used Extreme in the same 2005 Duramax and within the first 1/4 tank I noticed the truck fired up quicker.

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  103. Julio Crass

    5 out of 5 Great life saver

    Julio Crass

    I work with many diesel machines, heavy equipment, and they always give me trouble because of the water in the diesel, after using HotShotsecret they sound like new.

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  104. De Jong

    Question

    De Jong

    Does Diesel Extreme help relive leaky injectors that cause white smoke at idle after 30 minutes of engine use? Duramax LB7

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    • dejong0823

      dejong0823

      Follow-up, after running 2 tanks with Extreme Diesel mix the white smoke is significantly reduced, but not eliminated. Overall the engine runs quieter and smoother after treatment. The product did what it claimed.

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    • dejong0823

      dejong0823

      Thanks, I placed my order this morning and will let you know the outcome in a couple of weeks.

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    • One person found this helpful
      Spencer W.

      Spencer W. (verified owner)

      Diesel Extreme removes internal diesel injector deposits that can cause LB7 injectors issues. I’d recommend trying back to back doses, a one quart bottle will treat 80 gallons. We have a money back guarantee if we can’t fix your issue which makes Diesel Extreme a great place to start when trying to correct this issue. Thanks!

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  105. Ed

    Question

    Ed

    Will a over dose of diesel extreme hurt my Cummins?? Thanks in advance

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    • Jim Darley

      Jim Darley

      I overdosed my 97 f350 7.3 and it shut down. Had to have it towed to shop, will find out on Monday what the diagnosis is.

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    • Spencer W.

      Spencer W. (verified owner)

      Jim, if you need any assistance, give us a call at 1-800-341-6516 and let us know if we can help figure out what’s going on. Thanks!

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    • Spencer W.

      Spencer W. (verified owner)

      Ed, you’ll be fine. We recommend filling up once your tank hits 3/4 capacity to help dilute the Diesel Extreme if you overfill. You won’t hurt your truck, but topping it off a few times will help level out the treatment cost. Thanks Ed!

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  106. Larry

    Question

    Larry (verified owner)

    Just bought 17 f350 diesel what do you recomend for the whole truck.
    Thanks,
    Larry

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    • Spencer W.

      Spencer W. (verified owner)

      Congratulations on the new truck Larry! I’d recommend our Everyday Diesel Treatment, this will ensure that every ounce of diesel fuel you put in your truck is the best it can be. Firepunk Diesel in Plain City, OH tested our Everyday Diesel Treatment in a 2016 6.7L Cummins and proved an 11.2 horsepower increase using their dynamometer. This is due in part to the fuel being optimized for the combustion process, thanks to the cetane boost of EDT. We’ve also seen newer trucks correct DPF and regen issues with EDT, so we know the emissions equipment will also appreciate the cleaner burn of the fuel.

      On the oil side, FR3 Friction Reducer is a great choice. In third party tests, FR3 has reduced wear an extra 43% over untreated Rotella engine oil; this translates to your new investment being on the road longer. Enjoy the truck! Thanks!

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  107. Thomas

    Great Product!

    Thomas (verified owner)

    I really like this product. I have shared it and recommended it to friends and family, and now they are sold on it too!

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  108. cjmyers01

    5 out of 5 02 cummins

    cjmyers01

    I recently purchased a 2002 Dodge Ram 2500 with 5.9l cummins I stated with a oil change and add the hot shot stiction eliminator and also add the diesel extreme to the tank. The truck runs so much smoother and going to continue with EDT in the tank at every fill up. So far I love all of the hot shot secret products and will be a long time user.

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  109. Mike

    Question

    Mike

    Can I use this product to my Kobuta mower?

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    • Spencer W.

      Spencer W. (verified owner)

      Mike, yes Diesel Extreme is completely compatible with your diesel Kobuta. Our Everyday Diesel Treatment would also be a great option, it has more fuel stabilizer in it which is beneficial if you park the tractor for extended periods. Thanks!

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  110. Nathen

    Question

    Nathen

    Can I use diesel extreme,edt,and stiction eliminator all at the same time?

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    • Spencer W.

      Spencer W. (verified owner)

      We recommend Diesel Extreme initially to clean out the fuel system, and then following up with Everyday Diesel Treatment to maintain the system and ensure we don’t have poor quality fuel. Stiction Eliminator is for the oil side and can be used at anytime, every third oil change. Thanks!

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  111. David W. Sommerville

    Question

    David W. Sommerville

    Any issue with using every tank? What dosage rate would you recommend if its ok to use each tank?

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    • Spencer W.

      Spencer W. (verified owner)

      Hi David! While Diesel Extreme is a more powerful clean formulated for use every 6 months, the Everyday Diesel Treatment is better suited for everyday use. To better explain; the Diesel Extreme is like going to the dentist twice a year to ensure there is no build up, and EDT is like brushing your teeth everyday to keep your system clean. Going to the dentist everyday would be more expensive than brushing your teeth too. I’d recommend trying our Everyday Diesel Treatment after an initial Diesel Extreme dose. 1-2 ounces of EDT will treat 25 gallons of fuel, saving you money in the long run. Undertreating with a few ounces of Diesel Extreme for a few tanks might help use up whatever is left in your bottle, but in the long run I would definitely recommend our Everyday Diesel Treatment.

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  112. Peter

    Question

    Peter

    will diesel extreme take care of slime, algae, microbes, bacteria, and fungus

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    • Spencer W.

      Spencer W. (verified owner)

      Diesel Extreme will help prevent slime, algae, microbes, bacteria, and fungus from starting; but depending on how severe your situation is I would recommend a Biocide or a more specific product unfortunately. If you need any help getting your system clean give us a call at 1-800-341-6516 and we’ll see how we can better assist you!

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  113. Dwayne Leigh

    Diesel Extreme

    Dwayne Leigh (verified owner)

    Product did what it said it would motor runs smother and better injertors haven’t been cleaned for some time I’m going to run some more through it

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  114. Keith Ghent

    Diesel extreme

    Keith Ghent

    Haven’t used it yet but was wondering why you can’t use this product with any other fuel additive?

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    • Spencer W.

      Spencer W. (verified owner)

      You can use Diesel Extreme with other products, but Diesel Extreme contains the maximum cleaner and cetane improvers, you won’t see compounded benefits when using other products with the Diesel Extreme. You’ll see a higher cost effectiveness when using the products separately. Thanks!

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  115. John

    5 out of 5 Does the job

    John

    It gave a bit more pep to the truck

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  116. Christian Brooks

    5 out of 5 Great product!

    Christian Brooks (verified owner)

    My ’06 F350 with the 6.0 Powertstroke starts faster and idles smoother after using the diesel extreme.

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  117. Gary

    Diesel Extreme , great product!!!!

    Gary (verified owner)

    i was a little skeptical, but after the first treatment, I immediately notice a difference. On my first trip to town, after adding the diesel extreme, I noticed an increase in the mpgs, at least 3 or 4 more miles per gallon on the interstate. Then on a hill that my truck usually down shift, held in 8 th gear without down shifting. I am very pleased with the product and plan to continue to use it along with the EDT treatment. Finally , a product that does with it says it will do, well done Hot Secret.

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  118. Trinity

    08 F350 King Ranch

    Trinity (verified owner)

    After buying my King Ranch with 180k miles on it. A friend told me about this product and how much it helped his truck so I figure’d give it a try because I didn’t know about how this truck was taken care of. Could tell my idle wasn’t as rough after a few hundred miles plus got a little more spunky and maybe got a mile better per gallon. Now truck is deleted and fixin to do my second dose as recommended.

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  119. Peter

    Question

    Peter

    is Deisel Extreme the same as BG 245 . which works faster / better?

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    • Spencer W.

      Spencer W. (verified owner)

      Peter, while we have not tested against their product, our product has been the most potent and strongest in system cleaning and fuel boosting properties of all competitors we have tested to date. I do not see an SDS sheet for their product on their website so I cannot answer to the exact strength of their product. We have a money back guarantee, no questions asked policy; they seem to offer a much more complicated service schedule to receive protection with no money back guarantee. They do not have dosage listed on their website, if we base dosage off a customer on Amazon then we offer a more cost effective treatment. 16oz of Diesel Extreme will treat as much as one quart of their product, for a quarter of the price of their product. I would choose Diesel Extreme for quicker results and better results. Down the road if you decide to try both and are not impressed by our superior formula, we’ll honor the money back guarantee. Thank you.

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  120. jesus d soto

    5 out of 5 hot shots product

    jesus d soto

    product is great and I recommend it to everyone

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  121. Larry

    5 out of 5 6.4L Ford 220,000 miles

    Larry (verified owner)

    Use Extreme often. Love the product. Excellent product. Will continue using.

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  122. Mike F

    Diesel Extreme

    Mike F

    Great product, only took 500 miles to tell a difference.

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  123. Stan Edwards

    Question

    Stan Edwards

    Transmission additive , where can I buy it in ga

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    • Spencer W.

      Spencer W. (verified owner)

      Hello Stan, here’s our locator map: http://www.hotshotsecret.com/locations/

      TSE can be a little more difficult to find locally since we tend to push the fuel and oil additives to retailers before the TSE. If you can’t find any locally on the map feel free to give us a call at 1-800-341-6516 and we’ll help get you some!

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  124. Frank Price

    Question

    Frank Price

    Will this help with a injector sticking in my 6.9 it idle’s rough around 450 to 500 R.P.M. and shakes really bad and has white smoke i just had a injection pump put on if this will fix my problem about how long will it take?

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    • Steven Dunn

      Steven Dunn

      Frank, your 6.9 is a mechanically gear driven injection pump engine. There are no stiction issues to be concerned with. Stiction occurs with HEUI injectors that require high pressure oil systems that exist on both the 7.3 or 6.0 Powerstroke, especially the 6.0. I used to have a 6.9 however and I have used the Diesel Extreme. Depending how dirty the injector(s) may be could be the difference in how long your performance increase becomes noticeable. If you use the product, I would recommend not drive the truck to the grocery store, but take it on a good non-stop 200+ mile open highway road trip. Stretch her legs! I speak with confidence that you will notice a difference.

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    • Spencer W.

      Spencer W. (verified owner)

      Frank, we offer a money back guarantee, so there is no downside to trying Diesel Extreme out for your issue. As for a length of time, it depends on too many factors to narrow down each case. Most users typically see large improvements between 5-50 miles, and usually report issues being completely resolved before the 100 mile mark. Most users opt to let their truck idle for a little and then take it out for some highway driving. We’re here at 1-800-341-6516 and can offer advice, M-F 8-4:30 EST.

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  125. Salvatore Cosenza

    5 out of 5 Diesel Extreme use for 2 years

    Salvatore Cosenza (verified owner)

    I Started using Diesel Extreme 2 years ago after watching a YouTube Video of TruckU. I first purchased the product from Amazon. I previously had been using Stanadyne additives in my 1999 Chevrolet K2500 6.5 Diesel Suburban from original purchase new in 1998. The first improvement with Diesel Extreme was sub-freezing startup on the first attempt rather than 3-5 attempts prior to using Diesel Extreme. Over time my highway mileage increased from 17 to 19 miles per gallon using the same Citco Diesel from the same station. After one year of use deceleration rattle dissipated to non audible. The cold morning startup has been the best improvement for me.

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  126. keith wilkinson

    5 out of 5 wont use any other products !

    keith wilkinson

    been using diesel extreme in my truck for about a month and ive noticed a increase in mpg’s and a bit more responsive in throttle i refuse to use any other products and will continue to use diesel extreme and the oil stiction also in ever oil change and fuel treatment in every fill up of my tank it will be a bit costly to keep doing it but it out ways having to replace my injectors and keep my fuel cleaner due to living in lovely michigan seem to get some crappy fuel from time to time

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  127. Job Delgadillo

    Question

    Job Delgadillo

    Do you add it in every fill up or just every 6000 miles?

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    • Spencer W.

      Spencer W. (verified owner)

      Every 6k miles or 6 months, whichever comes first! Our Everyday Diesel Treatment is formulated for everyday use.

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  128. Silver Spoons

    Question

    Silver Spoons

    I recently purchased a houseboat with twin Caterpillar Diesels and a Westerbeke Deisel Generator. The fuel is about eight years old. Just before winterization last year all three engines “bogged” down and stopped running – UGH – Contaminated fuel I suspect. I changed all filters and water separator elements. I have three 250 gallon tanks. Two of the tanks have been empty for about 12 years and have been filled less than 10 times after being cleaned in 2005. The other tank is the one with the old fuel which could have as much as 125 gallons remaining. Several questions: Will your product work in a marine application where the fuel sits for long periods of time? Not knowing the condition of the fuel or the contaminants in the tank, do I need to empty the old fuel before adding Diesel Extreme? Should the empty tanks be cleaned before putting new fuel in or will the Diesel Extreme be sufficient? How much product should I use per tank. Often should I use it. One note, I’ll be taking the vessel on about a 1,000 mile voyage in a couple of months. Let me thank you in advance for your time and interest.

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    • Don

      Don

      Will Diesel Extreme get water out of fuel

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    • Spencer W.

      Spencer W. (verified owner)

      Absolutely! Our Everyday Diesel Treatment will also address moisture in fuel.

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    • Silver Spoons

      Silver Spoons

      Thank you for your response Spencer! An update following this seasons first visit to the boat this past weekend: Last fall, in a quandary about how to retrieve and then dispose of the remaining old fuel (about 125 gallons), I remembered being told the furnace also operates on diesel and draws from the same tank as the engines. In hopes of “burning up” the remaining fuel, I left the furnace running for the winter – HURRAY – SUCCESS – the fuel gauge now indicates an empty tank. Question: If there are a few gallons remaining, as I doubt the tank is “bone dry”, do I need to be concerned or will fresh fuel and the Diesel Extreme be sufficient to mitigate any negative effects the small amount of remaining fuel may still have? Is it recommended to run the Diesel Extreme with every tank until seasonal lay-up when I switch to the Everyday Diesel Treatment? Also, one important piece of information I didn’t share in my first post, each of the three 250 gallon tanks are aluminum. Again, thank you!

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    • Spencer W.

      Spencer W. (verified owner)

      Nice! Glad we got rid of that fuel easily! Fresh fuel and a dose of the Diesel Extreme will be more than sufficient for diluting the rest of the old fuel.

      You’ll see the results and protection you’re desiring by using Diesel Extreme in this initial tank, then follow up doses of 1 ounce per 25 gallons Everyday Diesel Treatment throughout the summer and a 2oz per 25 gallon dose when storing; 16 ounces of EDT will treat 400 gallons of fuel. EDT also has fuel stabilizing properties which make it perfect if you’re storing the fuel for long stretches of time. A dose of Diesel Extreme every spring offers long term benefits to cover you 6 months at a time. EDT focuses on fuel quality while Diesel Extreme is a potent cleaner and fuel booster.

      No issues with using our products with aluminum tanks; I like the corrosion resistance of aluminum tanks but once corrosion starts it is hard to stop. Congrats on the purchase and we wish you safe travels!

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    • Spencer W.

      Spencer W. (verified owner)

      Mark, our products will work with marine applications, Diesel Extreme would be what I recommend for “waking” up this tank of fuel, and then our Everyday Diesel Treatment is a great fuel stabilizer for when the boat gets put in storage in the future.

      While BP and Chevron both agree that diesel fuel has a storage life of 6-12 months, we find that pretty pessimistic. For your eight year old fuel, one of my only reservations is that the tank was only half full which promotes water build up and corrosion in the tank. If you’re able to look into the fuel with a flashlight we can get a sense of the level of fuel degradation and contamination by seeing how dark the fuel is. Diesel Extreme contains the maximum amount of cetane improver, water dispersant, and is backed by a money back guarantee. If we can’t get that fuel to work, let us know and we’ll issue a refund or send more product, just hang on to your receipt. Worst case scenario is you might plug up a few fuel filters throughout the course of this tank, lowered power from the energy content the fuel has lost, more black smoke from exhaust, etc. The key is fresh, high quality filters to prevent damaging lines and injectors. If the engine or generator starts and runs on the fuel I would top off with fresh diesel fuel. It’ll probably be difficult to start with the fuel, and a headache to keep running on it; if you have the means to safely dispose of the old fuel that would be the headache free way to go.

      The empty tanks should be good to go with either Diesel Extreme or Everyday Diesel Treatment, if you’re able to visually inspect for corrosion/rust I definitely would recommend doing so.

      Two quarts of Diesel Extreme will treat 150 gallons of fuel.

      1-2 ounces of Everyday Diesel Treatment will treat 25 gallons of new fuel depending on your desired dose; a 16oz bottle treats 400. I’d put one ounce per 25 gallons if you’re running the fuel soon, two ounces per 25 gallons if you’re storing the fuel.

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  129. Kurt

    Question

    Kurt

    I have a 2000 f250 7.3 powerstroke with 326k on her what additive should I use. And how does the money back guarantee work?

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