Engineered for pre-2007 diesel engines in on-road applications as well as all model year diesel engines in off-road applications. High 12 TBN controls acids from combustion blow-by and EGR. Additives control soot thickening, oxidation and wear. Extended drain capabilities reduce downtime and motor oil expenses.
Package sizes include:
1-Quart Bottle
1-Gallon Bottle
2.5-Gallon Bottle
30-Gallon Drum
55-Gallon
Drum
AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil is engineered for use in a wide variety of light- and heavy-duty 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 diesels equipped with EGR systems.
AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil is recommended for diesel engines, gasoline engines and other applications that require any of the following specifications:
• SAE 15W-40
• 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
AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil is a premium diesel oil that provides excellent performance in all types of diesel engines 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.
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.
AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil can extend drain intervals far beyond those recommended for conventional petroleum oils. Its unique synthetic formulation and long-drain additive chemistry deliver maximum engine protection, cleanliness and performance over extended drain intervals, reducing vehicle maintenance and waste-oil disposal costs.
AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil is heavily fortified with detergent/dispersant additives and is naturally resistant to soot. It is designed to keep soot particles suspended independently and prevent them from aggregating to form larger, wear-causing particles. Viscosity increase is minimized and soot-related wear is reduced.
AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil has lower volatility than conventional petroleum oils. Oil consumption and emissions are minimized due to less vapor passing into the combustion chamber. Lower volatility helps AMSOIL 15W-40 Diesel Oil retain its viscosity after high-temperature service for continued dependable protection.
AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil eases cold-weather starting (down to -44°F) and provides vital startup lubrication to help prevent engine wear. AMSOIL Synthetic Heavy Duty Diesel Oil outperforms conventional 15W-40 petroleum oils and minimizes the impact of cold-weather operation.
AMSOIL Synthetic Heavy Duty Diesel and Marine Oil 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, mechanically-sound vehicles or equipment as follows:
Diesel Engine Service:
Three times (3X) OEM* recommendation, not to exceed 50,000 miles/600 hours or one year, whichever comes first. Drain intervals may be extended further with oil analysis.
Gasoline Engine Service:
Two times (2X) OEM* recommendation, not to exceed 15,000 miles or one year, whichever comes first.
*Operating conditions and drain intervals for severe and normal service are defined by the OEM. Refer to your owner's manual.
Note: Extended drain intervals are not recommended when using biofuels containing >10% ethanol or 5% biodiesel (B5). Follow OEM drain intervals or extend drain intervals with oil analysis.
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).
Click here to view the MSDS Data Sheet for AMSOIL AME.
Keep out of the reach of children. Don't pollute. Return used oil to collection centers.
| TYPICAL TECHNICAL PROPERTIES | |
| AMSOIL Synthetic SAE 15W-40 Heavy-Duty Diesel and Marine Motor Oil (AME) | |
| Kinematic Viscosity @ 100°C, cSt (ASTM D445) | 14.5 |
| Kinematic Viscosity @ 40°C, cSt (ASTM D445) | 98.4 |
| Viscosity Index (ASTM D2270) | 153 |
| CCSViscosity @ -20°C, cP (ASTM D5293) | 4892 |
| Pour Point °C (°F) (ASTM D97) | -40 (-40) |
| Flash Point °C (°F) (ASTM D92) | 240 (464) |
| Fire Point °C (°F) (ASTM D92) | 250 (482) |
| Four Ball Wear Test (ASTM D4172: 40kg, 75°C, 1200 rpm, 1 hour), Scar, mm | 0.35 |
| Noack Volatility, % weight loss (g/100g) (ASTM D5800) | 6.6 |
| High Temperature/High Shear Viscosity (ASTM D5481 @ 150°C, 1.0 X 106 s.-1, cP | 4.22 |
| Total Base Number | 12.1 |
Product Name: Heavy Duty Diesel & Marine Motor Oils
Current Rating: 4.91out of 5 stars
Votes & Reviews: 316 vote(s) and 236 user reviews.
Reviewed by Michael: 
The ONLY oil i use in my 2002 F350 7.3 Powerstroke. I get 25,000 miles between oil changes!
Reviewed by Flint:
it's a good product but I don't like the gallon jug design. They're hard to pour.
Reviewed by Leslie:
Have used this oil in my Duramax since it finally broke in at 70,000, I now have 255,000 on it and every oil test came with 50% oil life after 10,000. I do a lot of short trips along with really long trips towing.
Reviewed by Corey:
Makes changes a snap in my duramax. The 2 1/2 gallon jug fills her to the top of the stick. Great product and easy to order too
Reviewed by Jeremy:
2004 dodge Cummins Great oil Truck runs awsome
Reviewed by Billy:
I have used amsoil in my 2003 dodge ram 3500 the oil, performs very well has always checked good with an oil analysis 222,000 miles without ant oil related problems towing horse trailers and now a 36ft 5th wheel
Reviewed by Yaremchuk:
Very good quality.
Reviewed by Kenneth:
Boatload of additive for Excellent TBN analysis between extended oil changes.
Reviewed by Brandon:
Great oil. Love it so far!!
Canada
United States
Reviewed by Peter Jaeger:
15/40 HD Marine
Awesome oil for my 2010 F350 6.4. Deleted in 2011 when I started using the Amsoil and now have 243,000 Km on Sept 2020 with no issues. Runs great. Change oil once per year but change oil filter every 6-7 thousand Km. Just got oil analized and all is great,,, don't need to change oil yet but I will soon for piece of mind and yes it will be Amsoil again.