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 144 reviews)

Ratings Distribution

  • 5 Stars

     

    (135)

  • 4 Stars

     

    (8)

  • 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 144 customers

Displaying reviews 1-10

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4.0

Again

By 

from Atlanta ks

Verified Buyer

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

Tractor

  • How would you describe yourself?:
  • I use AMSOIL products for my business
  • What kind of vehicle/equipment do you have?:
  • Tractor
 
4.0

will contune buying

By 

from Florida

Verified Buyer

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

this motor oil ,i got no comment to say ,the fluid is great, the antiwear formulars that is blended in is good and it do not burn within oil change inteval,i normally replace every 20,000 to 25000 miles on the ram with the 6.7 diesel.

  • How would you describe yourself?:
  • I'm a professional mechanic
  • What kind of vehicle/equipment do you have?:
  • all is Ram 2500 and others
 
5.0

Diesel oil review

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

Been using this oil since I have had 25,000 miles on my 05 duramax now have 128,000 plus miles and it still going strong. Now I don't put as many miles on the truck and I only have to change the oil once a year. Also use AMSOIL filters.

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • Cars trucks and motorcycle plus a atv.
 
5.0

I will always buy this product

By 

from Ontario Canada

Verified Buyer

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

I change my oil every 10-20k in my 99 cummins. Its still gold in colour after 5k.i proudly show everyone

  • How would you describe yourself?:
  • I'm a DIY handyman
  • What kind of vehicle/equipment do you have?:
  • 99 cummins 09 harley softtail 88 snowmob

(1 of 1 customers found this review helpful)

 
5.0

Only oil I use in my SD 7.3L

By 

from St Peters, Mo

Verified Buyer

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

I pull a 38 ft 5th wheel. The oil gives me the extra miles I wanted between oil changes. I have Gained over a mile per gallon in millage after switching to AMSOIL

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • 2001 F-250 SD Super Cab
 
5.0

I have used this product for 5 years and it is the best oil

By 

from Calgary

Verified Buyer

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

change oil once per year after about 50 hours of operation

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • all kinds and everything has amsoil lube
 
5.0

Trust worthy quality product

By 

from belgrade, MT

Verified Buyer

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

Use in my work truck that is constantly pulling equipment .

  • How would you describe yourself?:
  • I use AMSOIL products for my business
  • What kind of vehicle/equipment do you have?:
  • 2004 chevy duramax 3/4 Ton
 
5.0

Used this for 10 Years

By 

from Las Cruces, NM

Verified Buyer

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

I run this in my 03 Cummins 5.9. Great oil, have 356,000 on her.

  • How would you describe yourself?:
  • I'm a full-on gearhead
 
5.0

Great stuff

By 

from Northern Michigan

Verified Buyer

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

Duramax diesel

  • How would you describe yourself?:
  • I love my vehicles / toys
  • What kind of vehicle/equipment do you have?:
  • Pickup truck, Harley Davidsons (2), Van,

(1 of 1 customers found this review helpful)

 
4.0

Pretty good

By 

from Anderson sc

Verified Buyer

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

Put in an 07 duramax fully deleted great
Put In a 13 duramax fully deleted typewriter ticks slightly
Put in a 2015 duramax fully deleted typewriter ticks really bad

  • How would you describe yourself?:
  • I'm a full-on gearhead
  • What kind of vehicle/equipment do you have?:
  • 2007 duramax 2013 duramax 2015 duramax

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