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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

Warning - Click here for Proposition 65 information for this product

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

Data Bulletin

Warranty

SDS



Heavy-Duty Synthetic Diesel Oil 15W-40

  • 5 star rating
    15w-40
    By  EDWARD,  a  Verified Buyer  from  Texas  on  June 02, 2023
    I would recommend this product to anyone I use it in my 2013 6.7 and it works great.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    like the product
    By  Rudolf,  a  Verified Buyer  from  Montana  on  May 01, 2023
    like Amsoil products
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Oil review
    By  DOUG,  a  Verified Buyer  from  Calif.  on  April 24, 2023
    My Amsoil Rep recommended this oil for my 7.3 Ford Superduty. I have been using it for 140K miles without issues. The vehicle has 241K on it and has been trouble free since I purchased it 21 years ago. I only wish I had used it the oil for its 1st 100K miles. I recommend Amsoil products to all my friends.
    Bottom Line
    Yes, I would recommend this to a friend.
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  • 5 star rating
    The best!
    By  JOSHUA,  a  Verified Buyer  on  April 24, 2023
    My MPG have improved. Truck runs quieter and smoother.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Awesome product
    By  WADE,  a  Verified Buyer  from  Loganville Ga  on  April 17, 2023
    This is the only products I will use in my 05 F350 6.0. Always great talking with Nathan Peszko about the new products and what I want to order. He always ships it to my house.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    AMS oil is the very best.
    By  JAMES,  a  Verified Buyer  from  Florida  on  April 09, 2023
    In 1978, the military did a study on synthetic oils in the Fairbanks area to see which were the best. AMS Oil was rated the best and I've used it ever since... to include 2 years in Fairbanks and 3 years in Anchorage. Nothing works better in really cold weather and l have complete confidence in it.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Equipment oil
    By  BARRY,  a  Verified Buyer  from  Statesville NC  on  April 04, 2023
    Works great in my Nido powered zero turn as I generally mow 2 acres once a week plus another 4 acres every other week. Very dusty conditions. Normally never had an oil related issue or overheating issue. Highly recommend.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Great for 5.9 24v Cummins
    By  KARSTEN,  a  Verified Buyer  from  AL  on  April 03, 2023
    My 380,000+ mile 24v cummins loves this stuff.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Delivered quickly
    By  DOUGLAS,  a  Verified Buyer  from  Yelm Washington   on  March 21, 2023
    Delivery was quick and painless. Received the product in two days. Way faster than I thought.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Best oil and addictives
    By  EMMANUEL,  a  Verified Buyer  on  March 16, 2023
    5 star products
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?