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

(based on 158 reviews)

Ratings Distribution

  • 5 Stars

     

    (148)

  • 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 158 customers

Displaying reviews 1-10

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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
 
5.0

I use this product religiously!

By 

from Bailey, Colorado

Verified Buyer

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

I like the fact that I change it only once a year!

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • Ford f250 diesel
 
5.0

Amazing product

By 

from Montana

Verified Buyer

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

We have been using this oil in our diesels for over 8 years and it has never let me down. We had a fleet of 150 gensets and 50 semis. Not once did we have an engine failure due to lubrication qualities with this oil. Our engines in the gensets lasted 26,000 hrs before we would pull them out of service to rebuild. I have used this oil in my personal diesel pickups and have never been disappointed. I will run this oil for life.

  • How would you describe yourself?:
  • I'm a professional mechanic
 
5.0

I buy this product religiously

By 

from Sierra Vista, AZ

Verified Buyer

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

This is used in my 95 F250 7.3 diesel & i credit it with keeping it running well for over 400k miles

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • Pickup truck - SUV - motorhome
 
5.0

I buy this product every time when needed

By 

from BC Canada

Verified Buyer

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

We have a diesel Pusher motorhome and since using this product I figure my engine (Cummins) runs smoother and cooler, along with the extended mileage, it is a no brainer for performance and cost savings overmore frequent oil changes. I installing a By Pass filter to clean the oil even more than the stock filter does, My coach has a Allison Transmission so that gets the 'TORQUE DRIVE " Synthetic oil and the rear end has the 80/140 oil too. Nothing but the best for us for sure.

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • Foretravel 36' U295, Honda CRV, Chevy Ta
 
5.0

Using this product in my trawler

By 

from Seattle, WA

Verified Buyer

Comments about 10W-30/SAE 30 Synthetic Heavy-Duty Diesel Oil:

Used this product in a Westerbeke 4 cylinder diesel engine in a sailboat for a number of years. 100 hour standard oil change interval. With this product I changed the filter every 100 hours and the oil at 300 hours. Oil test/analysis indicated the oil was still good at 300 hours. Now I use it in an American Diesel (Ford Lehman) 6 cylinder industrial engine in my trawler. 200 hour standard oil change interval. I changed the standard oil filter every 200 hours and the oil at less than 600 hours (1 year). Oil test analysis at 493 hours indicated the oil TBN was 8.8 and oil was still good. This allows me to operate my boat all summer in remote locations from Tacoma, WA to Juneau, AK without having to change oil.

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • 1998 Kadey-Krogen 42 Trawler
 
5.0

Yes

By 

from Cortland ob

Verified Buyer

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

Chev duramax des

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • 2002 chev diesel truck
 
5.0

Will continue to buy

By 

from VA

Verified Buyer

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

Use it on both of my 7.3s love it

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

Good oil!

By 

from Portland, Or

Verified Buyer

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

Was having some stiction issues with my 7.3. Was recommended this product by an oil specialist. Never heard of Amsoil before I used it. Seemed like my engine loved it as I could tell that it started right up and seems to have restored any loss of power. Stiction seems to have gone away even in cold start ups. Will exclusively use this product.

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • 2001 F350 7.3 Powerstoke
 
5.0

Like this product used it for longtime

By 

from Washington

Verified Buyer

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

Great product about some it up used it four years. Not only use 14-40 in my 2003 dodge i use amsoil in all my stuff

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • Motorcycles, jeeps, trucks,cars and atvs

Displaying reviews 1-10

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