Transmission Fluids
Filtration Products
Air Intake Systems
2-Cycle Oils
Fuel Additives
Brake Fluids
Industrial Lubes
Family Fleet
Farm & Ranch
Heavy Equipment
Oil Selection & Filter Lookup Guide

AMSOIL Synthetic 15W-40 Diesel and Marine Motor Oil



AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil (AME) is a premium diesel oil providing excellent performance in all types of diesel engines where highly effective control of wear and deposits is vital. Built with heavy-duty dispersant/detergent additives, its 12 TBN chemistry neutralizes acids and controls soot thickening from EGR and blow-by to protect against corrosion, cylinder bore polishing (wear) and varnish/sludge deposits. AMSOIL AME resists heat and breakdown better than conventional petroleum oils for long lasting performance and protection.

AMSOIL, the leader in automotive synthetic lubrication, produced the world"s first API qualified synthetic motor oil in 1972. Trust the extensive experience of AMSOIL The First in Synthetics to do the best job protecting your engine.

Extends Drain Intervals

AMSOIL AME can extend drain intervals far beyond those recommended for conventional petroleum oils. Its unique synthetic formulation and long drain additive system deliver the best possible engine protection, cleanliness and performance over extended drain intervals, reducing vehicle maintenance and waste oil disposal costs.

Advanced Soot and Wear Control Formula

AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil is heavily fortified with detergent/dispersant additives and is naturally resistant to soot. It keeps soot particles suspended independently, preventing them from attaching together to form larger, wear-causing particles. Viscosity increase is minimized and soot related wear is controlled.

Reduces Oil Consumption and Emissions

AMSOIL AME has lower high temperature volatility (evaporation) than conventional petroleum oils. Because less oil vapor passes into the combustion chamber, oil consumption and emissions are reduced. Additionally, lower volatility helps AMSOIL AME retain its viscosity after high temperature service for continued dependable protection and excellent fuel economy.

Excellent Cold Flow Properties

AMSOIL AME remains fluid down to -51F. It eases cold weather starting and provides vital start-up lubrication to prevent engine wear. AME outperforms conventional 15W-40 petroleum oils and greatly minimizes the impact of cold weather operation.


AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil is engineered for use in a wide variety of light and heavyduty applications, 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 modern low emission diesels such as those equipped with EGR systems.

AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil is recommended for use in diesel engines requiring any of the listed worldwide specifications and gasoline engines requiring API SL, SJ, SH, or ACEA A3.

  • API CI-4+, CF, CF-2, SL
  • ACEA A3/B3, E2, E3, E5
  • Global DHD-1
  • JASO DH-1
  • Mack EO-N Premium Plus '03
  • DDC Power Guard 93K214
  • Caterpillar ECF-1
  • Cummins CES 20071, 20072, 20076, 20077, 20078
  • Volvo VDS-2, VDS-3
  • MB 228.1, 228.3, 229.1
  • MAN 271/3275
  • MTU Type 2
  • MIL-PRF-2104G
  • Also recommended for Allison transmission C-4 applications


AMSOIL AME is compatible with conventional and synthetic motor oils. Mixing AMSOIL motor oils with other oils, however, will shorten the oil life expectancy and reduce the performance benefits. AMSOIL does not support extended drain intervals where oils have been mixed. Aftermarket oil additives are not recommended for use with AMSOIL motor oils.


AMSOIL Synthetic Heavy Duty Diesel and Marine Motor Oil is recommended for extended drain intervals in unmodified(1), mechanically sound(2) vehicles or equipment as follows:

  • For diesel-fueled, light truck vehicles, extend oil drain intervals up to 25,000 miles or one year, whichever comes first, or longer based on oil analysis.
    • - In diesel auto/light trucks, replace AMSOIL or Donaldson Endurance™ oil filter at 25,000 miles or one year, whichever comes first. Replace Donaldson "P" Series and other brand oil filters at standard OEM* intervals.
  • For non-EGR equipped heavy-duty "on-road" trucks or off-road equipment and diesel powered marine craft, extend drain intervals up to 2X the OEM* recommended interval or one year, whichever comes first, or longer based on oil analysis.
  • For EGR equipped or low emission (2002 & newer) heavyduty "on-road" trucks, extend drain intervals based on oil analysis or use OEM* recommended intervals.
    • - In heavy-duty trucks, off-road equipment and marine diesel, replace AMSOIL full flow or Donaldson Endurance™ filters at the time of oil change up to 2 times OEM* standard intervals, not to exceed 60,000 miles or 500 hours. Replace Donaldson "P" Series and other brand oil filters at standard OEM* intervals.
  • In gasoline engines, extend oil drain intervals based on oil analysis or use OEM* recommended intervals.Change AMSOIL full flow oil filters at the time of oil change, not to exceed 12,500 miles. Replace other brand oil filters at standard OEM* intervals.

    *OEM = Original Equipment Manufacturer

(1) Where the engine or operating conditions have been modified from the original manufacturers' design, no oil change interval recommendation is made. Oil change intervals are at the owner's discretion. Examples include the use of performance computer chips; modified exhaust, fuel or air induction systems and the use of fuels other than those recommended for normal operation by the manufacturers.

(2) Engines are in good working condition and within the factory design settings. Mechanically sound engines, for example, do not leak oil or consume excessive amounts, are not worn out, do not overheat, do not have internal or external anti-freeze leaks and have a properly working emission control system. AMSOIL recommends repairs be made to malfunctioning engines prior to the installation of AMSOIL synthetic oils.

AMSOIL Ea™ and Donaldson Endurance™ full flow oil filters are designed for extended drain intervals. They stop smaller particles, have less restriction and last longer than regular filters. For best performance, use AMSOIL Ea or Donaldson Endurance oil filters. AMSOIL by-pass oil filters are specialized for the removal of small, wear-causing dirt particles, thereby extending engine life. AMSOIL encourages using an AMSOIL bypass filter system for maximum engine and oil life.

Health & Safety

This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Material Safety Data Sheet (MSDS). MSDS's are available upon request.


 AMSOIL Synthetic SAE 15W-40 Heavy-Duty Diesel and Marine Motor Oil (AME)

Kinematic Viscosity @ 100C, cSt (ASTM D-445)


Kinematic Viscosity @ 40C, cSt (ASTM D-445)


Viscosity Index (ASTM D-2270)


CCS Viscosity @ -20C, cP (ASTM D 2602)


Pour Point C (F) (ASTM D 97)

-46 (-51)

Flash Point C (F) (ASTM D 92)

236 (457)

Four Ball Wear Test (ASTM D-4172 B: 40 kg, 75C, 1200 rpm, 1 hour, Scar in mm)


Noack Volatility, % weight loss (g/100g) (ASTM D-5800)


High Temperature/High Shear Viscosity cP, 150C, 1.0 X 106 s.-1, (ASTM D 4683),


Total Base Number


© 2009 by AMSOIL Direct Jobber - The Oil Garage

No portion of this site may be used or duplicated without the express permission of AMSOIL Direct Jobber - The Oil Garage
Designed and administered by JB Design