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

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$10.75 Retail Price (USD)
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Product Code: AMEQT-EA
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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.

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 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.

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.com 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.com/about/guarantee.aspx.


AME Package Sizes
Code Package Size Unit of Measure Product
AMEQT (AMEQT-EA) Quart Each SAE 15W-40 Heavy-Duty Diesel and Marine Oil
AMEQT (AMEQT-CA) Quart Case of 12 SAE 15W-40 Heavy-Duty Diesel and Marine Oil
AME1G (AME1G-EA) Gallon Each SAE 15W-40 Heavy-Duty Diesel and Marine Oil
AME1G (AME1G-CA) Gallon Case of 4 SAE 15W-40 Heavy-Duty Diesel and Marine Oil
AMETP (AMETP-EA) 2.5-Gallon Each SAE 15W-40 Heavy-Duty Diesel and Marine Oil
AMETP (AMETP-CA) 2.5-Gallon Case of 2 SAE 15W-40 Heavy-Duty Diesel and Marine Oil
AME30 (AME30-EA) 30-Gallon Drum Each SAE 15W-40 Heavy-Duty Diesel and Marine Oil
AME55 (AME55-EA) 55-Gallon Drum Each SAE 15W-40 Heavy-Duty Diesel and Marine Oil
AME27 (AME27-EA) 275-Gallon Tote Each SAE 15W-40 Heavy-Duty Diesel and Marine Oil
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REVIEW SNAPSHOT®

by PowerReviews
AMSOILSAE 15W-40 Heavy-Duty Diesel and Marine Oil
 
4.9

(based on 167 reviews)

Ratings Distribution

  • 5 Stars

     

    (157)

  • 4 Stars

     

    (9)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

99%

of respondents would recommend this to a friend.

Most Liked Positive Review

 

Oil that makes engines last a lifetime

I have been running this oil for seven years. I ran it in a fleet of 125 Generators, 25 Loaders, and 40 Kenworth semis. I never once in 3 years had an engine...Read complete review

I have been running this oil for seven years. I ran it in a fleet of 125 Generators, 25 Loaders, and 40 Kenworth semis. I never once in 3 years had an engine failure. These pieces of equipment ran around the clock in the oil fields. Our generators would run 26,000 Hours before we would bring them in for a rebuild. We would take them out of service for a rebuild, the engines never failed. I would reccomend this product to anyone and I would put it against any other oil on the market. I run it in all my personal vehicles and engines. I will be an amsoil customer for life.

VS

Most Liked Negative Review

 

Diesel Oil

My 1996 Ford F-250, 7.3 Powerstroke never leaked oil until I started using this product. Only 137000 miles.
Works well in inboard boat engine.

My 1996 Ford F-250, 7.3 Powerstroke never leaked oil until I started using this product. Only 137000 miles.
Works well in inboard boat engine.

Reviewed by 167 customers

Displaying reviews 1-10

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5.0

Only Synthetic I buy...

By 

from Morgan Hill, CA

Verified Buyer

Comments about SAE 15W-40 Heavy-Duty Diesel and Marine Oil:

I am almost at 200K on my Ford 2002 Super Duty Truck and hope to go to 300K + miles. Very happy with Amsoil quality and prompt service/shipping. I have ventured out and used other related diesel products in my truck with great success as well. Thx for providing a great product.

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • 2002 7.3L Super Duty
 
5.0

I would buy this product again & again

By 

from Henderson, Maryland

Verified Buyer

Comments about SAE 15W-40 Heavy-Duty Diesel and Marine Oil:

I have been using this oil seance 2005. I got a 2004 F-250 with 170,000 miles. I wouldn't use any other oil

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • 2004 F-250
 
5.0

Been using this product for years.

By 

from Rolla Mo

Verified Buyer

Comments about SAE 15W-40 Heavy-Duty Diesel and Marine Oil:

I have been using Amsoil heavy duty diesel and marine oil for the past 12 years in my 2004 GMC Duramax 2500HD truck. I have pulled a trailer all over this county and the engine has 360,000 and running strong.
For what you pay for a truck, it's worth using the best lubricates out there to get the most mileage.

  • How would you describe yourself?:
  • I use AMSOIL products for my business
  • What kind of vehicle/equipment do you have?:
  • 2004 GMC 2500HD Duramax
 
5.0

long time runnin'

By 

from durango, co

Verified Buyer

Comments about SAE 15W-40 Heavy-Duty Diesel and Marine Oil:

My 2001 F-350 has been running with Amsoil the whole way. A mechanic told me to do it. Check back with me in another 16 years. (-;

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • lots
 
5.0

Have'n bought anything but Amsoil for 7 years

By 

from Mount Pleasant, SC

Verified Buyer

Comments about SAE 15W-40 Heavy-Duty Diesel and Marine Oil:

I've run Amsoil products for a combined 750,000 miles between my vehicles. Never had a breakdown from a related issue. Nothing but the best

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • Cars, Trucks, Boats, Motorcycles
 
5.0

I would buy this product again

By 

from San Jose, Ca

Verified Buyer

Comments about SAE 15W-40 Heavy-Duty Diesel and Marine Oil:

I have been an Amsoil customer for almost twenty years. I use Amsoils in all my vehicles and am totallt satisfied with the performance.

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • 2005 Duramax diesel
 
5.0

Perfect winter oil

By 

from Fort McMurray Alberta

Verified Buyer

Comments about Series 3000 5W-30 Synthetic Heavy Duty Diesel Oil:

This is my winter oil for my 1998 Dodge Ram 5.9L diesel. Use this oil with my Amsoil bypass system.....change to it in November (from 15-40). Have been using this as winter oil for many years with absolutely no issues, truck starts well whether plugged in or not.

  • How would you describe yourself?:
  • I love my vehicles / toys
 
5.0

Half a million plus

By 

from Northeast Nebraska

Verified Buyer

Comments about SAE 15W-40 Heavy-Duty Diesel and Marine Oil:

I have used only Amsoil 15-40 Heavy Duty Motor Oil in my service pickup since it was new. It has over 509,000 miles with out any motor repair and I lost all my oil twice when some external oil lines broke but Amsoil saved my engine.

  • How would you describe yourself?:
  • I use AMSOIL products for my business
  • What kind of vehicle/equipment do you have?:
  • chevy 6.5 turbo diesel
 
5.0

Great Product

By 

from Camp Springs, KY

Verified Buyer

Comments about SAE 15W-40 Heavy-Duty Diesel and Marine Oil:

I've been running the 15w-40 Heavy Duty Diesel and Marine Oil for years in all my work trucks. I've owned 3 7.3 psd Fords, and a 2008 with the 6.4. Though this oil is not recommended for the 08, it has been deleted and does just fine in it. (if your truck is not deleted, use the recommended oil) I use Amsoil oil filters and do extended oil changes. 15,000 miles on all the trucks. Though I don't do oil samples on every oil change, whenever I have, they always come back good. In fact, I could probably go to 20,000 miles if I want to.

  • How would you describe yourself?:
  • I use AMSOIL products for my business
  • What kind of vehicle/equipment do you have?:
  • Powerstroke Diesels. 2-7.3's, 1-6.4
 
5.0

cummins diesels in a boat

By 

from Virginia

Verified Buyer

Comments about SAE 15W-40 Heavy-Duty Diesel and Marine Oil:

Love all amsoil product from racing jet skis to now running it in my 41 foot boat.

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • 4100 Maxun sbc

Displaying reviews 1-10

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