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AMSOIL 15W-40 Heavy-Duty Diesel and Marine Oil
Product code : AMEQTC-EA
- Recommended for applications specifying API CI-4+ and prior specifications
- Controls soot and wear
- Reduces oil consumption and emissions
- Delivers maximum engine protection over extended drain intervals
- Provides outstanding protection and performance in temperature extremes
- Try Signature Series Max-Duty 15W-40 for a serious upgrade
AMSOIL 15W-40 Heavy-Duty Diesel and Marine Oil
Premium diesel oil providing excellent performance in diesel engines where highly effective control of wear and deposits is vital. Built with heavy-duty dispersant/detergent additives with 12 TBN, Synthetic Heavy-Duty Diesel & Marine Oil neutralizes acids and controls soot thickening from EGR and blow-by to protect against corrosion, cylinder bore polishing (wear) and varnish/sludge deposits. It resists heat and breakdown and is formulated for extended drain intervals.
See the product data sheet for full details.
CONTROLS SOOT AND WEAR
- Neutralizes acids and controls soot thickening to protect against corrosion, wear, varnish and sludge deposits
- Reduces oil consumption and emissions
- Delivers maximum engine protection over extended drain intervals
EXCELS IN EXTREME TEMPERATURES
- Provides outstanding protection and performance in temperature extremes
- Resists heat and breakdown better than conventional oils
- Eases cold-weather starting and provides vital startup lubrication
AMSOIL 15W-40 Heavy-Duty Diesel and Marine Oil
Data Bulletin
Data BulletinsWarranty
SDS
AMSOIL 15W-40 Heavy-Duty Diesel and Marine Oil
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WalterBy YAREMCHUK, a Verified Buyer from Orland Park,IL on April 14, 2025Good quality,recommendedBottom LineYes, I would recommend this to a friend.Was this review helpful?
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amazing qualityBy ERIC, a Verified Buyer on February 11, 2025i did a full fluid flush being , front diff , engine oil , transmission, t case , rear diff . the fluid quality is out standing as for the truck now runs and rolls like new and much more quiet as before. it’s clearly more happy that it was now that all fluids are done. the g56 manual trans shifts like new now and it’s got 140k on it . highly highly recommend AMS oil. i need to do a coolant flush next so if they sell coolant i will be buying it soon. 10/10 starsBottom LineYes, I would recommend this to a friend.Was this review helpful?
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So far it hasn't blown up!By KEVIN, a Verified Buyer from Long Beach, CA on December 26, 2024First time changing the oil on my new to me 2003 F250 xlt 6.0L. was recommended the marine oil for the additives. We shall seeBottom LineYes, I would recommend this to a friend.Was this review helpful?
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Great product!By geneo, a Verified Buyer from Idaho on November 03, 2024Using their product from front to the rear of my truck. 265,000 and still going strong.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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OldtimerBy PAL, a Verified Buyer from Windsor, ON on July 05, 2024I am running with this oil since 2007. Caterpillar 3406E. Oil changes are way over 60K miles. Do I need to say more?Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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Great StuffBy DAKOTA, a Verified Buyer from Arkansas on June 05, 2024Have always ran Rotella or the Polaris brand oil in our Polaris Ranger Diesel. Made the switch and immediately the motor is far quieter than it has ever been. Seems to stay cleaner as wellBottom LineYes, I would recommend this to a friend.Was this review helpful?
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15w40 diesel marine oilBy STEVE, a Verified Buyer on April 29, 2024Best oil you can buy.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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Diesel and MarineBy KEITH, a Verified Buyer from desert southwest on April 25, 2024I have been using this oil in my Ford 7.3 for 15 yrs without a single problem. I change oil and filter every 10,000mi.Bottom LineYes, I would recommend this to a friend.Was this review helpful?
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WalterBy YAREMCHUK, a Verified Buyer on April 16, 2024Very good qualityBottom LineYes, I would recommend this to a friend.Was this review helpful?
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Synthetic 15w40 diesel oilBy DAVID, a Verified Buyer from Ocala FL on March 03, 2024Good price excellent productBottom LineYes, I would recommend this to a friend.Was this review helpful?
