15W-40 Synthetic Diesel & Marine CI4

A Legacy Diesel Oil from AMSOIL, the 15W-40 Diesel and Marine

Although AMSOIL has several upgraded forms of the AME 15W-40 Diesel and Marine, we still keep it in stock as long as it’s available. Still a great choice for older diesel engines and heavy-duty equipment. Many will use it for it’s original high zinc formulation established before the EPA limitations. This a clear choice for flat tappet cam cars as well.

If you want to upgrade in your diesel I do suggest the lower cost ADP 15W-40 Heavy-Duty Diesel which replaced it but if you have been using this for ages, we have it in stock.

This oil has been AMSOIL’s big draw to the brand since it came out in 1976. Still regarded as the best choice for all non-DPF equipped diesel engines built before 2007 or any heavy-duty diesel engine built before diesel particulate filters were mandated.

AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil is a premium
diesel oil that provides excellent performance in all types of diesel
engines without exhaust aftertreatment systems, where highly effective
control of wear and deposits is vital. Engineered with heavy-duty
dispersant/detergent additives, its Total Base Number (TBN) of 12
neutralizes acids and controls soot thickening from exhaust gas
recirculation (EGR) and blow-by to protect against corrosion, cylinder
bore polishing (wear), varnish and sludge deposits. AMSOIL 15W-40
Diesel Oil resists heat and breakdown better than conventional petroleum
oils for long-lasting performance and protection

Product Data Sheet

The AMSOIL 15W-40 Diesel & Marine (product code AME) is robust with powerful detergents and a higher more lasting ZDDP zinc formulation than competing oils and for your older work trucks you wish to keep within the fleet including those which have seen better days, this is the perfect choice. Compared to the most popular diesel oils out there, this one lasts three times longer and will not lose viscosity within that span (or 1-year whichever comes first).

Diesel Oil Applications

AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil is engineered for use in a wide variety of light- and heavy-duty applications not equipped with exhaust aftertreatment systems, including over-the-road trucks, off-road construction, marine engines, farm equipment, mining, industrial (pumps & generators) and personal automotive or commercial transportation. It is excellent for use with low- or high-sulfur diesel fuels in standard, turbocharged or supercharged engines, including diesels equipped with EGR systems.
Use AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil in diesel engines, gasoline engines and other applications that call for the following:

SAE 15W-40 Compatibility

• API CI-4+/CI-4/CH-4/CF CF-2/SL/SJ
• ACEA A3/B3, E2, E3, E5, E7
• Global DHD-1
• JASO DH-1
• Mack EO-M, EO-N
• DDC 93K214
• Caterpillar ECF-1A, ECF-2
• Cummins CES 20076, 20077, 20078
• Volvo VDS-2, VDS-3
• MB 228.1, 228.3, 229.1
• MAN 271, 3275
• MTU Type II

Years ago AMSOIL astonished fleet owners with the refuse truck fleet study showing the common Rotella lasting a solid 300 hours under severe service but the AMSOIL AME 15W-40 outlasted 900 hours w/o any change of viscosity and caused the 8000 hour overhaul to be skipped. The drivers all were impressed and trucks which didn’t get plugged into the block heaters were OK for starting the next morning (Test done in Duluth over all seasons). Drivers also noted the significant improvements in the hydraulic operation using AMSOIL’s best AW series multi-viscosity oil.

Should really be the best selling oil in the Sioux Falls area for those who want to keep and preserve their diesel work trucks avoiding the newer models which are a fuel economy and service department nightmare. The main choice for those wanting to keep their 7.3 Fords forever!

Don’t forget the Diesel Fuel Lubricant!

Diesel and Marine Reviews

Great Stuff

By DAKOTA,  a  Verified Buyer from  Arkansas on  June 05, 2024

Have 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 well