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green diamond 10w30 full synthetic

Green Diamond Fleet Oil

$33.95 - $36.95

Green Diamond Fleet Oil

(72 customer reviews)

  • EXPERT DIESEL ADVICE
  • 100% SATISFACTION or your money back
  • GUARANTEED not to void your manufacturer’s warranty

HEAVY DUTY DIESEL ENGINE OIL

Infused with FR3 Nano Lubricant Technology

  • 5W-40 & 10W-30 Green Diamond Fleet Oils are a 100% pure synthetic using only Group III base oils.
  • 15W-40 Green Diamond Fleet SEMI Synthetic Oil is a synthetic blend of Group II and Group III base oils.
  • 15W-40 Green Diamond Fleet FULL Synthetic Oil is a 100% pure synthetic using only Group III base oils.
  • 1 GAL 10W30 Full Synthetic CK4
  • 1 GAL 15W40 FULL Synthetic CK4
  • 1 GAL 15W40 Semi Synthetic CK4
  • 1 GAL 5W40 Full Synthetic CK4
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Hot Shot’s Secret Green Diamond Fleet Oil offers:

  • Improves Cold Weather Starting compared to Conventional Oils
  • Improves Fuel Economy up to 3%
  • Lowers Oil Consumption 78% over CJ-4 Spec Oils
  • Reduces Wear 71% less than CJ-4 Spec Oils
  • Improves Power
  • Increases Film Strength
  • Improved Oxidation Stability
  • Improved Aeration Control
  • Handles Soot 46% better than CJ-4
  • Widens Operating Temperature Range
  • Anti-Rust Protection
  • Reduces DPF Plugging
  • Reduces Shearing
  • Reduces Friction
  • Reduces Deposit Formation
  • Reduces Noise and Vibration
  • Extends Oil Change Interval
  • Extends Injector, Turbo and Engine Life

Green Diamond Fleet 15W-40 synthetic oil can be run over 60,000 miles, as long as the oil is kept clean and monitored every 6,000 miles for TBN number.

The infusion of our patented FR3 Nano-Technology and CK-4 additive package provides unsurpassed levels of longevity and performance, all while keeping the oil cleaner longer and providing better mileage and horsepower. Green Diamond Fleet Oil was formulated to meet severe operating conditions such as hauling heavy loads, stop and go and operation in areas of high airborne particulates.

All Green Diamond Fleet Oil is fully formulated CK-4 motor oil with high detergency plus exceptional oxidation and thermal stability, preventing deposits and oil breakdown and making longer drain intervals possible. In addition to exceeding the API CK-4 specification, the HSS 5W-40 and 10W-30 Green Diamond Fleet meets the requirements from Ford for added wear protection as stated in Ford Specification WSS-M2C171-F1 (Not all CK-4 specification oils meet both the CK-4 and the Ford specification).

Green Diamond Fleet Oil is recommended for most diesel engines. The CK-4 specification is backwards compatibles with the CJ-4 and the CI4 Plus.

Hot Shot’s Secret Green Diamond Fleet Oil is great for:

No other diesel oil or fuel additive has a better guarantee than Hot Shot’s Secret products. If our products do not deliver as promised, then we will give you your money back. End of story.


10W-30 CK-4 SYNTHETIC – Tech Data
10W-30 CK-4 SYNTHETIC – SDS
5W-40 CK-4 SYNTHETIC – SDS
15W-40 CK-4 SEMI-SYNTHETIC – SDS
5W-40 CK-4 SYNTHETIC – Tech Data
15W-40 CK-4 SEMI-SYNTHETIC – Tech Data
15W-40 CK-4 FULL-SYNTHETIC – SDS
15W-40 CK-4 FULL-SYNTHETIC – Tech Data

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4.97 out of 5 stars

72 reviews

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What others are saying

  1. C F Hooker

    Good price

    C F Hooker

    I’m changing from Amsoil to this oil from Hotshot for my Ram Cummins. Price is a bargain compared to Amsoil!

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    • Hot Shot's Secret

      Hot Shot’s Secret

      Thank you!!

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  2. Kevin Pranger

    Kevin Pranger

    Great product !
    Changed the oil in my deleted 2008 Dodge 2500 6.7L Cummins and within just a few hours of driving I noticed a difference in the quietness of the engine. Easier starting, smoother running, and within a few days my mileage went up 2.5 MPG. I have been running with this oil for just under a month now and have found a noticeable improvement in all aspects of the engine. Better power, starts, and mileage and a cleaner more consistent power coming from initial touch of the throttle all the way up to kickdown for passing and smoothness in cruising. HUGE improvement. Found horsepower I did not know I had, and a comforting smoothness in how it runs.

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    • Hot Shot's Secret

      Hot Shot’s Secret

      Thanks Kevin!

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      Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...

  3. Peter Olmeda

    Great performance even out of the old 7.3

    Peter Olmeda (verified owner)

    Makes my old 7.3 less noisy. With a bypass filter I go 12K between oil changes

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    • Hot Shot's Secret

      Hot Shot’s Secret

      Thanks Peter!

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      Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...

  4. Lance Walston

    Full syn 15w40 fleet oil

    Lance Walston (verified owner)

    Use in my truck, excavator, and tractor now. Better performance all around and less engine noise.

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    • Hot Shot's Secret

      Hot Shot’s Secret

      Thanks Lance!

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      Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...

  5. Clayton

    Diamon fleet oil

    Clayton (verified owner)

    So far the best oil I have used in our 2020 duramax 6.6 we use the 15 40. Use to use the t6 rotella oil an the motor had much more typewriter tick. The diamond fleet reduced that noise by about 75% and appears to be much cleaner by the next oil change

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    • Hot Shot's Secret

      Hot Shot’s Secret

      Thanks Clayton!

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      Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...

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