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SAE 15W-40 Heavy-Duty Diesel and Marine Oil

Product code : AMEQTC-EA

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.
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.

SAE 15W-40 Heavy-Duty Diesel and Marine Oil



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.

Extends Drain Intervals
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.

Controls Soot and Wear
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.

Reduces Oil Consumption and Emissions
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.

Excellent Cold-Flow Properties
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.

APPLICATIONS
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

COMPATIBILITY
AMSOIL Synthetic Heavy Duty Diesel & Marine Oil is compatible with conventional and synthetic motor oils. Mixing AMSOIL motor oils with other oil, however, will shorten the oil's 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.

SERVICE LIFE
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 80,400 kilometers/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 24,000 kilometers 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 10% biodiesel (B10). Follow OEM drain intervals or extend drain intervals with oil analysis.

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). An MSDS is available via the Internet at www.amsoil.ca or upon request at (715) 392-7101. Keep Out of Reach of Children. Don't pollute. Return used oil to collection centers.

For warranty information, visit www.amsoil.ca/about/guarantee/.


SAE 15W-40 Heavy-Duty Diesel and Marine Oil



SAE 15W-40 Heavy-Duty Diesel and Marine Oil

  • 5
    287,000 miles using this oil
    By  DAN,  a  Verified Buyer  from  CA  on  May 25, 2021

    Describe the issue

    I've been using the 15-40 Heavy-Duty Diesel and Marine oil in my 2006 GMC 2500 HD Duramax LBZ since I bought it new and now have 287,00 miles on it and many of those miles towing heavy loads in the heat.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Better than Expected
    By  Cambren,  a  Verified Buyer  from  FL  on  May 21, 2021

    Describe the issue

    I used this in my marine diesel engine. I had some reservations based on past experience with synthetic diesel oil from another manufacturer (noisy operation), but this far exceeded my expectations. Since switching from the industry standard mineral based oil to Amsoil Heavy Duty and Marine Diesel Oil, I have higher oil pressure and cooler operating temps, and the noise level seems lower as well. I am very satisfied.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    01’ F250 7.3l Platinum Edition 400k miles
    By  RONNEY,  a  Verified Buyer  from  Texas  on  May 07, 2021

    Describe the issue

    Folks, I switched to Amsoil at 150,000 miles now I have 400,000 miles on my truck. I believe the quality of Amsoil and there filters are keeping the engine wear down. My last Blackstone oil sample (paraphrasing here) recommended I increase oil change intervals if desired because the sample indicates an engine of around 130,000 miles. I especially enjoy the the super quick delivery to my doorstep.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Great oil that works
    By  Richard,  a  Verified Buyer  from  CT  on  April 08, 2021

    Describe the issue

    I changed the oil in my 2010 F 150 to Amsoil and the gas millage has increased by by 4 miles to the gal. I am very happy with the new oil and will keep a eye on the millage to see if it stays good
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    excellent oil
    By  BRYAN,  a  Verified Buyer  from  ND  on  March 06, 2021

    Describe the issue

    i use this oil in my 8030 allis-chalmers tractor. this synthetic oil is excellent we get to 20 below zero here in the winter and i use this tractor on the snowblower and the minute the tractor makes one revolution with the starter the oil pressure light is off and it starts way easier with this oil. i am very satisfied with this product. would recommend to anybody who would want to use it. super product.
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    Best for any engine--especially older ones
    By  WILLIAM,  a  Verified Buyer  from  Arizona  on  February 26, 2021

    Describe the issue

    This is probably the best in the world.
  • 5
    By  BRIAN,  a  Verified Buyer  from  Utah  on  February 15, 2021

    Describe the issue

    I work my Diesel hard towing doubles in the mountains you can always count on Amsoil to protect your engine
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    By  Ben,  a  Verified Buyer  from  Ingleside, Ontario, Canada  on  February 10, 2021

    Describe the issue

    Have used this product since 1997, and still impress with it. Do oil change once a year (approx 25000 kilometers per yr) send an oil sample to Lab and return are excellent. Highly recommended
    Bottom Line
    Yes, I would recommend this to a friend.
  • 5
    ByPass Filter oil
    By  Robert,  a  Verified Buyer  from  Washington  on  January 30, 2021

    Describe the issue

  • 5
    15/40marine diesel
    By  John,  a  Verified Buyer  from  Keremeos. Bc, Canada   on  January 29, 2021

    Describe the issue

    I have been using this engine oil in my Diesel Pusher Motor coach for 10 years and would not use another oil. I also have the Turbo Drive automatic oil in Allison Transmission and because this transmission is not only very good but it is an expensive one that I only want the best oil in it. I actually replaced the recommended Castrol Transynd oil that was in it to this Amsoil one and noticed that the shifting is smoother and the temperatures are lower during use. I monitor all the engine and transmission activity thru a computer while driving so I actually am seeing what is happening at any time, so, these issues I see and not only feel.
    Bottom Line
    Yes, I would recommend this to a friend.