Diesel Extreme

Diesel Fuel Additive & Injector Cleaner

4.91 out of 5 based on 35 customer ratings
(56 customer reviews)

USD 11.95USD 1,849.95

Earn up to 1850 Points.

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

FREE SHIPPING on every order (Contiguous US)


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
SKU: P0404

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4.91 out of 5 stars

56 reviews

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What others are saying

  1. C Arter

    5 out of 5 Diesel Extreme

    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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  2. 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.

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

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    • Spencer W.

      Admin (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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  3. Dan Ertz

    5 out of 5 Great product

    (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

      Admin (verified owner)

      Thanks Dan, keep us posted!

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  4. Chris Campbell

    Injector eating LB7's Best friend

    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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  5. Dean

    Question

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

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    • Levi

      Admin (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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  6. Marc Winters

    5 out of 5 Diesel extreme

    (verified owner)

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

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  7. Marc

    Question

    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

      Admin (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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  8. Johnny

    5 out of 5

    (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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  9. Mike Duncan

    4 out of 5 Diesel extreme

    (verified owner)

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

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  10. Jeff S.

    Question

    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

      Admin (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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  11. Levi

    Question

    What do I use for diesel algae?

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    • Spencer W.

      Admin (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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  12. 5 stars,

    boat mec. & repair all.

    (verified owner)

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

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  13. Michael

    4 out of 5 Good

    (verified owner)

    It works good

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  14. Kevin McBride

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

    (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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  15. Julio Crass

    5 out of 5 Great life saver

    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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  16. De Jong

    Question

    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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    • One person found this helpful
      Spencer W.

      Admin (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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    • dejong0823

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

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    • 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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  17. Ed

    Question

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

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    • Spencer W.

      Admin (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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    • 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.

      Admin (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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  18. Larry

    Question

    (verified owner)

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

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    • Spencer W.

      Admin (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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  19. Thomas

    Great Product!

    (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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  20. cjmyers01

    5 out of 5 02 cummins

    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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  21. Mike

    Question

    Can I use this product to my Kobuta mower?

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    • Spencer W.

      Admin (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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  22. Nathen

    Question

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

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    • Spencer W.

      Admin (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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  23. David W. Sommerville

    Question

    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.

      Admin (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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  24. Peter

    Question

    (verified owner)

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

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    • Spencer W.

      Admin (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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  25. Dwayne Leigh

    Diesel Extreme

    (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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  26. Keith Ghent

    Diesel extreme

    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.

      Admin (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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  27. John

    5 out of 5 Does the job

    It gave a bit more pep to the truck

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  28. Christian Brooks

    5 out of 5 Great product!

    (verified owner)

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

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  29. Gary

    Diesel Extreme , great product!!!!

    (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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  30. Trinity

    08 F350 King Ranch

    (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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  31. Peter

    Question

    (verified owner)

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

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    • Spencer W.

      Admin (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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  32. jesus d soto

    5 out of 5 hot shots product

    product is great and I recommend it to everyone

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  33. Larry

    5 out of 5 6.4L Ford 220,000 miles

    (verified owner)

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

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  34. Mike F

    Diesel Extreme

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

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  35. Stan Edwards

    Question

    Transmission additive , where can I buy it in ga

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    • Spencer W.

      Admin (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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  36. Frank Price

    Question

    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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    • Spencer W.

      Admin (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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    • 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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  37. Salvatore Cosenza

    5 out of 5 Diesel Extreme use for 2 years

    (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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  38. keith wilkinson

    5 out of 5 wont use any other products !

    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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  39. Job Delgadillo

    Question

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

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    • Spencer W.

      Admin (verified owner)

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

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  40. Silver Spoons

    Question

    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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    • Spencer W.

      Admin (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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    • 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.

      Admin (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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    • Don

      Will Diesel Extreme get water out of fuel

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    • Spencer W.

      Admin (verified owner)

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

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  41. Kurt

    Question

    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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    • Spencer W.

      Admin (verified owner)

      Kurt, with a 7.3L I’d recommend Stiction Eliminator since it was developed specifically for International and Ford for their 6.0L and 7.3L. Our Diesel Extreme is the crowd favorite and since you only need a dose once every 6 months it’s a pretty easy way to make sure your truck is clean, protected and running strong. A Diesel Duo bundle would be perfect! The money back guarantee is simple; try any Hot Shot’s Secret product in your vehicle, if you’re not 100% satisfied let us know and we mail you a check. If you don’t notice a smoother idle, more power, improved fuel economy, or any other benefit listed on the label or our site we’ll honor the guarantee. Just hang on to your receipt or confirmation email so we don’t have to guess the amount! Limit is two bottles to keep people from abusing our policy, so the Diesel Duo definitely qualifies. Thanks!

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  42. Allen m Hafner

    5 out of 5 Miracle liquid

    (verified owner)

    I am amazed what the product has done for my truck.

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  43. jonathan stuart

    Diesel xtreme

    (verified owner)

    Seems to keep every thing moving!!!!!!!!!!!!!!

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  44. Tucker

    5 out of 5 Awsome!

    I have a E99 f250 6 speed, been having a bit of a rough idle once it warms up and a little bit of white smoke on cold start when below 40*. I have hears nothing but good things about these products and decided to try it, added 18oz to a full 46gal tank and within 100 miles of driving white smoke is completely gone and idles better then she every has even noticeable smoother shifts with engine being more consistent, will defiantly be running sticton eliminator in next oil change and EDT from now on. Amazing product!

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  45. eric

    5 out of 5 RENNER

    (verified owner)

    Great product showed awesome results within the first 100 miles on my 2000 f350 with 388K on it. smoother idle faster starts. Works as it is described and intended. I have had great results with the Transmission additive and am trying out the Diesel Additive as i just changed the oil for the first time since i have owned it, will rite a review after i have time to see the benefits.

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  46. Jorge Martínez

    Question

    I have Mercedes ML 270 cdi
    A lot of white smoke when cold.
    It will work on it?

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    • Levi

      Admin (verified owner)

      Yes absolutely, or your money back! Simply use at 8 oz per 20 gallons of fuel, and you should notice a difference in the first tank-full.

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  47. Merle

    Just added diesel extreme to my 99 7.3. went on a 1000 mile trip, the 7.3 was quieter on the Interstate at 75mph.

    Seems to work well.

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  48. stephen

    5 out of 5 clean and boost restored smoothness

    (verified owner)

    09 mercedes diesel rough running and starting so i used clean and boost and over two tanks the smoothness of a mercedes returned.
    starting also returned to normal with no skipping or shaking.
    great product.
    i am also trying the stiction eliminator and waiting on results, i just poured it in

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  49. Abdisemed

    What happen if I add my fuel tank with stiction eliminator

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    • Spencer Williams

      Admin (verified owner)

      Hello,
      For accidental use of Stiction Eliminator in the fuel tank, we recommend topping off with diesel fuel everytime your tank reaches the 3/4 or 1/2 mark to help dilute it.
      There are no ill effects from accidentally adding the Stiction Eliminator, but it is obviously not recommended. Keep it topped off and your truck won’t even notice!

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  50. James

    5 out of 5 Dodge cummins 3500 2006

    Had white smoke out tail pipe was told injectors used disel extreme white smoke gone awsome proudut will definitely recomed

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    • George Coble

      I have a 03 Dodge I bought new. I used buy fuel in it it stopped running. Tried for over a hour. Then ups brought my diesel Ex I took the fuel filter off filed it full of diesel Ex and poured some in tank. Turned it over let it set about 20 minutes and then started it. It started right up first or second crank eavey. I have a bob cat it quit. Ran diesel ex in it and cleaned the fuel and after a half hour it started loosing power cleaned the fuel filter witch was full of water. It done it two more times on one tank with diesel ex. It some how took all the water out of tank and lines. I bought it new and we eaven filter our fuel in a funnel besides the fuel filter on our 100 gal tank in back of truck. I use it and have gave some to my customers to help them. It would have cost me over 8900 to have dodge put new injectors in it. I’m not a genius but 29 dollars is a lot cheaper then 8900. Not to mention a lot more power and it runs better than when I bought it new.

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  51. The Wife

    5 out of 5 The Wife

    Husband drives 2006 Dodge diesel 2500. Of late, I thought it was running rougher than normal, but hubby didn’t notice, always in that truck. Finally, it flipped a code about injectors, and he limped the truck home. Never had used additives for cleaning in the 10 years we owned it. Our bad.
    Well, I hit the Internet, and stumbled upon Hot Shot Secrets Diesel Extreme. Bought it, added it to fuel, and let it run in the driveway for an hour. Hubby thinks it runs better than ever. Now also using HSS Stiction Eliminator also. Our 10 year old truck runs as smooth as ever. These products easily saved us an unnecessary $2000. repair bill.
    Thank you Hot Shot Secrets!

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  52. Casey Cazes

    It works

    My 2005 f350 would barely start and when I did it sputtered and blew white smoke. I added the deisel extreme and 35 gallons later she purred like a kitten. This shit is amazing!!!!!

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  53. Jeffrey Towne

    5 out of 5 Owner operator

    I had clogged injectors was using a product from Howes for three months and did very little if nothing to help clean my injectors did some research online and found Hot Shots Diesel Extreme poured 4 quarts of Diesel Extreme into my tanks and within one day my injectors or clean my truck was idling quietly and I had no more hesitation going up hills fantastic product everybody use this product … on my next Oil Change I will start using The stiction Eliminator

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  54. Tom Wilson

    I recently purchased a 2015 Ram EcoDiesel that was a trade-in. It had 98K miles on it. After driving it 400 miles home I got my first engine code: Turbo underboost sitting at idle. GULP????? Bad Turbo? now what?. After going to a local dealer and talking to guys on forums, it kept happening. Of course it would go into limp mode when the code was set so all I could do was reset the code and keep on trucking. Finally, one day I got an injector code along with the turbo underboost, and I wondered “dirty Injectors?”. So i got the Hot Shot Secret Diesel Extreme and put it through my system. I doubled the initial dose-I wanted to hit it hard. Well that did the trick. I have not had one turbo code or injector code Since I used the Diesel Extreme. (P.S. I since have concluded and have evidence that the dealer where I bought the vehicle knew about the codes, and had replaced the ECM among other things to deal with the problem- to no avail). I got a great deal on an EcoDiesel because the dealer was scared of it, and it only needed Hot Shot Secret to make it run like new.! thanks for a great product. I’m sold.

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  55. A.B.E. TOWING & RECOVERY

    A.B.E. Towing & Recovery
    Allentown, Pa.

    We are small towing company located in Allentown Pa. Our 2009 Nissan UD 2300DH was starting to have power loss in the pass 9 months. Dealer told us it was a bad EGR and would cost close to 3000.00 to fix with labor. Truck would be tied up at there dealership for a minimum of 1 to 2 weeks. Before I agreed to get this repair done I decided to do some research on chemicals to see if it would help. I looked at many chemicals and nothing really caught my eye that would fix the problem. I did research on your product and reviews, they really didnt give me much to go on. So I decided to go with my gut cause it is normally right.

    We added the products, we started with the extreme boost. After filling the tank and letting idle for 30 minutes, we drove it about 15 miles, already we notice more power better pick up. So we brought it back to the shop and did the oil changed and added the oil additive with the oil change. drove the truck 95 miles and now all of the sudden this truck is shifting better. Before it would shift between gears at 2200 to 2500 rpms, now its shifting at 1100 to 1500 rpm, fuel consumption is not even close to what it was. The jake brake is working better, hill climbing is like is was brand new truck!

    As we drive this truck longer during the night and day it is still improving little by little with BIG results. For $70.00 i may have solved the problem myself which means I saved 2925.00 in repairs.

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  56. Tom Dunlevy

    Iam big T from cape may nj and been using your products for a couple years now very happy with all of them I have a landscaping business so I have a few trucks that I treat on a regular basis I have a ford 2013 6.7 and I switched to full synthetic 5w40 and using your products in this truck since it was new just as a preventative for the future just wanted to double check it is ok to use in new trucks with low miles on your reviews it’s mostly older trucks with some miles on them ?

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  57. michael davis

    5 out of 5

    love this stuff!! It saved me from having to do a $3500 injector job at the dealership. I’ll be using this everytime from now on!!

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  58. Shawn Updike

    5 out of 5

    My name is Shawn, I have a 04 Dodge ram 3500 with 150,000 miles ato the end of a 4,000 mile round trip back home to visit my truck started running terrible. I suspected bad fuel, took it to a shop and was told it had 3 bad injecters…ouch. After a friend recommended this product,I thought it can’t hurt. After driving it for just 15 to 20 miles it was 90% better! I am convinced! Will run the rest of this tank and see what happens but wow! This could very well save me a huge repair bill.

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  59. Tom wilson

    5 out of 5

    I have a 2015 Ram EcoDiesel with 105K miles. I was getting codes for turbocharger under boost, injector problems and throttle control. My ECM was so confused. I added Diesel Extreme to the fuel. All the codes cleared up and I’ve gone 3K miles no problem. All the troubles stemmed from the fuel system. Great results with this product.

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  60. Myk Schulte

    5 out of 5

    Hello, My name is Myk and I drive an 08 Duramax LMM. My truck has 325k and has been all over the US. Just in the pass few months I have noticed that my fuel mileage and power was dropping and I my truck was going into reduce power mode a lot. Dealership told me I had an bad injector and recommended replacing all of them. Well that make sense do to the mileage but at $495 each that wouldn’t be a cheap bill.
    So after some research one additives to help prolong them. I was told about HotShot products and figured give it a shot. I desired to run 3 tanks with the hotshot back to back to help to give a good clean out. And I do have to say that I’m now on my 3rd tank with out hotshot and my truck still feels like a new truck. I have all the power and fuel mileage that I did when my truck was new.
    I also bought the oil treatment but waiting for my next oil change.
    Thank you for making such a great product. And if you guys have any decals/t-shirts I wouldn’t mind having a few.

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  61. Thomas wingate

    I have a 2006 Freightliner Century Class and I had begun losing power so much so that I had to downshift even though my flatbed my trailer was empty when going up hill. So I figured that if I was going the fuel injectors are clogged or motor was going bad I wasn’t sure because I’m not a mechanic. So I decided to try my luck and buy this stuff. I gotta tell you that I poured two gallons in my fuel tanks and within a hundred miles I noticed an increase in power and now trucks running smooth and the power has increased. Wow I have no doubt that I will need to rebuild in the next hundred thousand miles or so because my truck has 854207 miles on it but in the meantime trucks running great and I want to say thanks to great product and I highly recommend it.

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  62. lee gill

    i am still have not heard if you can use hot shot in mobil one 1 SYNTHETIC OIL

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    • Levi

      Admin (verified owner)

      Hello Lee!
      For Stiction Eliminator, synthetic oil is highly recommended (but not required). Also, most effective when used with a fresh oil change and safe to leave in for the life of the oil.

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  63. Glenn

    Just finished my first 2 quart bottle and I am sold. This stuff is great.

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  64. Dave Carlon

    (verified owner)

    Your fuel add sure smoothed out the old John deer 240 skid steer hour meter broke in 2004 lots of mowing, log loading brush cutting, wood spitting, snow plowing dirt and gravel work. . Started to run rough after parking out side all winter with little use, wish I had known about your product then, fresh diesel, and the right amount of hot shot, smoothed my old johnny popper out almost like new. John deer is on the hot shot diet from now on. Thanks for a product that works.

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  65. Kevin White

    5 out of 5

    As everyone here I was skeptical but decided to try the fuel side first. I have been using the white jug fuel additive for several years and hoping it was doing something beneficial for my engine. I have a 2003 long nose 379 C15 Platinum overhauled about 380k miles ago. I put the Hotshot fuel additive in my tanks and within 200 miles my engine was running so smooth I was waiting for a rod to come through the side of the motor. It wasn’t until I stopped for the evening that I could tell just how smooth the motor was running I pulled a nickel out of the ashtray and stood it up on the dash and it never moved. Laying in the sleeper that night it was strange feeling how smooth the truck was running with zero vibration. I can tell you the oil side will get treated next week and I will recommend Hotshot to everyone I come in contact with, I’m sold..

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  66. Al Gordon

    5 out of 5

    I just picked up a 2013 gmc denali 2500 a few months ago and this morning decided to put half a bottle of diesel extreme in when i filled her up and all I can say is amazing. The truck is stock with almost 74000 miles on it and its 13 miles from fuel station to my house and averaged 21.5mpg, I know the mileage is going to drop off but the truck instantly felt smoother both at idle and while driving. I can’t wait to see how it feels when I do the oil change and ise your stiction eliminator as well. I push your products to everyone who has a diesel, I’m also pushing my local autozone to get your antigel product in for winter. Thank you for your awesome products, I’ve used them in the past on a 03 F350 I had.

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  67. john m garcia

    5 out of 5

    used this along with the stiction eliminator and my 1999 7.3 runs like new again mileage is up throttle response is great thanks for a great product

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  68. Marshall Rugg

    5 out of 5

    I tried diesel extreme a few months ago. I was sceptical on these types of things but I won’t it on a contest. So I tried it. I was surprised 2mpg better less need to download shift. I used it in a all factory 2012 Ram 2500 CCLB 4×4 6 speed. Again it is not deleted.

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  69. David in SoCal

    Have an ’06 Duramax LBZ with 72,000 miles. Been using another brand of diesel fuel additives(no motor oil additives) for a couple years and will switch over to Hot Shots products as soon as my local store gets some in stock, because of the great customer reviews. When I asked the experts here about how to use the diesel additives, I was told NOT to use the Diesel Extreme and EDT at the same time. Great info, fast response, greatly appreciated. Although my Duramax seems to run OK, after I use these products and compare mileage/exh temps/injector balance rates, I will be filing a full review.

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  70. John T

    I own a 2012 VW Passat TDI, can I use this product on my car

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    • Levi

      Admin (verified owner)

      Absolutely, any diesel! Just 8 ounces every 6 months to keep the fuel system clean on a TDI.

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  71. TruckU forum fan

    5 out of 5

    (verified owner)

    I own a 2003 Dodge Ram 3500 Diesel 4×4. I use my truck only for towing my boats which means that my truck sits a lot in the garage. To give you an idea of how much it sits, I bought the truck new in 9-03 and it now (9-11-12) has 32k miles, not a typo! I have found out the hard way about diesel fuel becoming contaminated with algae and who knows what else. It was to the point where I couldn’t drive the truck for 100 miles without it losing power not being able to go up hills faster than 50mph due to a clogged fuel filter. I saw your episode recently about Hot Shot Secret Diesel Extreme so I decided to spend the cash and buy it. I have so far run 1.5 tanks of diesel with HSSDE added and my truck is almost back to 100%! I think it will be back to perfect after running the rest of my tank through it. I am a true believer of this product and highly recommend it to anyone thinking about buying it. Thank you to Truck U for doing an episode showing what this product can do, I love the show!

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  72. Max

    4 out of 5

    (verified owner)

    Hey guys, its Max.
    I now have 4,800 miles on my Hot Shot’s Secret and ran the entire bottle of the fuel detergent. Vehicle is running about 50% better. It still misses a little and these are brand new injectors with like 20k miles on them tops. Valves are good they were checked when head job was done, fuel filters changed, new oil cooler, EGR delete, head studs, bypass filter, I’ve done everything to make this truck run right. I think one more run of it in some Rotella t6 would have it running proper.

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  73. Jack - Slender Towing

    5 out of 5

    My friend told me about this and I used it on my International flatbed which I use to haul cars up and down the east coast. I thought I needed a new truck but he assured me that this could save it and sure enough, I poured it in and 20 minutes later my truck was running better then new. This product is amazing.

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  74. Tom

    5 out of 5

    (verified owner)

    Hey, I’m Tom from the Atlanta, Georgia area. I got a 96 Ford F250 with a 7.3 power stoke diesel. I tried your product for the first time on this past oil change. It made one hell of a difference. The mileage went up. I also tried the Diesel Extreme and I was very impressed with both products. I also have an ’06 F350 with the 6.0, I’m a fixing to try it in that truck also. I was very impressed with the products and in fact I just ordered a case of the Diesel Extreme and I’m fixing to place an order for the Hot Shot’s Secret [Stiction Eliminator]. Thank you very much.

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Dirt and water in your fuel system steal the power from your diesel. Your engine needs an extreme cleaning. Hot Shot’s Secret Diesel Extreme is a new and powerful formula designed to rejuvenate your diesel’s fuel system’s performance. Add a dose of Diesel Extreme at your next fill up and your engine’s fuel system will be cleaned, restored and boosted to its original performance power.

Diesel Extreme will clean everything in your tank, lines and injector tips and remove moisture. When used in conjunction with Hot Shot’s Secret Stiction Eliminator you will be giving your truck a complete cleaning on the inside. Stiction Eliminator is cleaning the oil side of the engine while Diesel Extreme cleans the fuel side. This product contains anti-oxidants and is not formulated for use in gasoline engines.

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Directions:
2 quarts treat 160 gallons of diesel fuel.
1 quart treats 80 gallons of diesel fuel.
16 oz. bottle treats 40 gallons of diesel fuel.

Recommended Frequency:
Use one treatment of Diesel Extreme every 6 months.

Uses:
Diesel Extreme is extremely effective in middle distillate fuels to improve combustion and ignition efficiency, enhance fuel economy and maintain fuel in a clean, stabilized condition. Hot Shot’s Secret Diesel Extreme is safe in all diesel engines: semi-trucks, pick-up trucks, farm equipment and autos. Including but not limited to: Ford Powerstroke, Dodge Cummins, GM Duramax, Saab, Volkswagen, and Audi.

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Fuel detergents commonly have five elements: rust and corrosion inhibitor, cetane booster, fuel stabilizer, metal de-activator, and detergent and dispersant. Most fuel detergent products on the retail shelf are a “boost now, die later” product. They contain minimal cleaners and maximum boosters so that the driver experiences only a short-term boost. Trying to “boost” a dirty fuel system is ineffective.

Hot Shot’s Secret Diesel Extreme is designed to support a “clean then boost” strategy. Diesel Extreme is unsurpassed in its cleaning power and will cleanse your whole system including cylinders and lines. It will restore your fuel system components to their original cleanliness and prepare them for maximum response when Diesel Extreme’s cetane booster kicks in.

Diesel Extreme is a concentrated cetane improver which also contains a highly effective fuel stability package. It will tremendously upgrade power and performance in all diesel equipment, increase mileage and provide maintenance economy. Storage stability of fuels will be greatly increased and diesel engines will be kept in a much cleaner and maintenance-free condition. In addition, Diesel Extreme has a stabilizing system to improve storage stability that will prevent polymerization and breakdown of hydrocarbons which results in gum and sludge formation. The dispersant prevents insoluble residues from forming, which are sometimes produced when mixing fuels from different sources. Corrosion is prevented by an inhibitor which produces a protective non-deposit-forming film on metal surfaces in the fuel.

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Official OSU Test Results »

Reducing the need to perform regeneration cycles: City of Columbus, Ohio »

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Diesel Extreme will improve cetane in the fuel giving it a smoother, less erratic pressure buildup in the combustion chamber during the ignition delay period, which occurs between injection and ignition. Controlling this pressure buildup eliminates the potential damage to piston rings and rod bearings. Power and fuel economy is increased as fuel burns more evenly and cleanly. Misfiring is controlled. When ignition improves, emissions are reduced and noise levels are lowered. Control of the pressure buildup allows more complete burning of the refractive molecules in the fuel, which steal power and produce deposits and wear. Cetane improvement gives quicker starts and faster warm-up at cold temperatures. Diesel Extreme will lower the minimum starting temperature of a diesel engine approximately 5°F.

Controlling Misfires, Stabilizing the Fuel System, and Improved Engine Performance. The point at which misfiring occurs in a diesel engine is influenced by the temperature of the intake air. Diesel Extreme will lower the temperature at which misfiring occurs by as much as 30°F. The fuel stabilizing system in Diesel Extreme eliminates problems caused by sludge, corrosion, rust or scale in degraded fuels. Sticking fuel injectors and plugged lines and filters are prevented, saving costly fuel and reducing maintenance. Engine performance is improved and wear is reduced when operating with clean, stabilized, sludge-free fuel. Diesel Extreme will not only prevent potential acid and sludge-forming reactions, which cause both corrosive and abrasive wear, but will disperse existing sludge and deposits.

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SDS
Tech. Data

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