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Heavy-Duty Synthetic Diesel Oil 15W-40

Product code : ADPQT-EA

• Delivers 4X more wear protection1
Minimizes oil consumption
Excels in extreme temperatures
Helps keep trucks and equipment operating at peak performance
Offers outstanding value

1Based on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 10W-30 as worst-case representation

• Delivers 4X more wear protection1
Minimizes oil consumption
Excels in extreme temperatures
Helps keep trucks and equipment operating at peak performance
Offers outstanding value

1Based on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 10W-30 as worst-case representation

Heavy-Duty Synthetic Diesel Oil 15W-40



Developed to provide protection beyond conventional, synthetic-blend and other synthetic oils. AMSOIL synthetic technology delivers heavy-duty protection for diesel enthusiasts and those who depend on their trucks and equipment to make a living.

See the Product Data Bulletin for full details.


HEAVY-DUTY ENGINE PROTECTION

  • Delivers 4X more wear protection1
  • Helps maximize equipment life
  • Helps reduce maintenance costs and downtime

1Based on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 10W-30 as worst-case representation

Delivers More Wear Protection

Third-party testing shows Heavy-Duty Synthetic Diesel Oil delivers 4X more protection against wear than required by Detroit Diesel’s* standard.I

IBased on third-party testing in the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222 using 10W-30 as worst-case representation. *All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use.


VISCOSITY CONTROL

  • Resists oxidation and the thickening effects of soot contamination
  • Retains viscosity after high-temperature service for added engine protection and increased fuel economy
  • Provides up to 66 percent less oil consumption2

2Than required by the API CK-4 standard in the Caterpillar-1N oil consumption test

Reduces Oil Consumption

Heavy-Duty Synthetic Diesel Oil provides up to 66% less oil consumption.L

Reduces Oil Consumption – Heavy-Duty Synthetic Diesel Oil provides up to 66% less oil consumption.

L Than required by the API CK-4 standard in the Caterpillar-1N oil consumption test.


EXCELS IN EXTREME TEMPERATURES

  • Provides outstanding protection and performance in hot and cold temperature extremes
  • Delivers improved heat and oxidation resistance compared to conventional diesel oils
  • Flows dependably in cold temperatures for easier startup and improved engine protection

See the Product Data Bulletin for full details.

Heavy-Duty Synthetic Diesel Oil 15W-40



Heavy-Duty Synthetic Diesel Oil 15W-40

  • 5 star rating
    Diesel
    By  STEVE,  a  Verified Buyer  from  Louisiana   on  July 05, 2022
    I use only this oil in my 2018 Duramx.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    Best oil I’ve ran in my vehicle
    By  RICHARD,  a  Verified Buyer  on  June 29, 2022
    Awesome oil couldn’t be happier with it
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Good stuff
    By  Anthony,  a  Verified Buyer  from  MN  on  June 20, 2022
    Driving 07 Chevy LBZ run this in the summer for the warm temperatures so far I have not had a problem
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Synthetic Diesel Oil
    By  WILLIAM,  a  Verified Buyer  from  Eastern Virginia  on  June 04, 2022
    I’ve got a rare 2003 F250 with the 7.3 in it, bought it new. I’ve been running AMSOIL Synthetics in it (engine, transmission and differentials) with the dual bypass filter system since approximately 2010. Zero mechanical issues. Sure it may cost a little more however, the protection and piece of mind are worth it! Wouldn’t use anything else.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Great Oil
    By  Bones,  a  Verified Buyer  from  Walla Walla WA  on  June 02, 2022
    Heavy Duty 15-40 Amsoil is a great oil for my 7.3 in my 2003 F-350 my engine is protected from normal wear to the engine I cannot say enough to the protection it gives me for my engine! Thank you AMSOIL.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Good oil to run in my F350
    By  TY,  a  Verified Buyer  from  Calgary Alberta   on  May 28, 2022
    Lasts longer worth the price for the protection and the mileage/hours on my trucks and equipment.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Best Oil
    By  NOAH,  a  Verified Buyer  on  May 27, 2022
    Slowly Switching all my trucks fluids over to Amsoil. Truck seems to run smoother now that I’ve switched the engine oil over.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Does the job
    By  ANDY,  a  Verified Buyer  on  May 19, 2022
    12 quarts of oil does the job perfect for a 6.7 Cummins for it to go tow 10k no problem.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Excellent Oil
    By  ROGER,  a  Verified Buyer  from  Dalmeny,Sask  on  May 12, 2022
    Anywhere I use oil or fuel treatment I use Amsoil only excellent product
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Good oil
    By  DANIEL,  a  Verified Buyer  on  May 07, 2022
    Good oil fast delivery I use amsoil in everything I own
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?