AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil

This AMSOIL 15W-40 is a powerful, heavy duty synthetic diesel marine oil formula designed to save money through extended oil change intervals, maximum wear control and reduced fuel consumption.

Contains 1377 ppm zinc and 1267 ppm phosphorous. For pre-2007 applications requiring API CI-4+.

15W-40 Synthetic Diesel & Marine Oil Package sizes include:
1-Quart Bottles (singles or case of 12)
1-Gallon Bottles (singles or case of 4)
2.5-Gallon Bottles (singles or case of 2)
30-Gallon Drum
55-Gallon Drum


Oil Depot can offer AMSOIL 15W-40 Synthetic Heavy Duty Diesel & Marine Motor Oil at wholesale prices to customers in Canada or the United States. Request a synthetic diesel oil price list using the contact form on this page.

AMSOIL 15W-40 Synthetic Heavy Duty Diesel & Marine Motor Oil is an elite formula that offers world-class performance and protection for your diesel engines. AMSOIL AME 15W-40 is designed to vastly outperform other synthetic and regular diesel oils.

This 15W-40 diesel motor oil is suitable for applications requiring the API CI-4+ specification and older specifications released prior to CI-4+. It is not suitable for applications requiring the API CJ-4 specification and is not compatible with late-model exhaust treatment devices. Refer to “Applications” below.

Features and Benefits of AMSOIL 15W-40 Synthetic Heavy Duty Diesel & Marine Motor Oil

  • Capable of exceptionally long drain intervals
  • Fights wear
  • Improves fuel economy
  • Diminishes the effects of acid and soot
  • Prevents deposits for clean engine internals
  • Combats corrosion

Long Service Life of 15W-40 Synthetic Diesel & Marine Motor Oil

AMSOIL employs serious synthetic oil chemistry with this 15W-40, boasting a service life of up to 3 times the OEM-recommended drain interval. Throughout these long service intervals, expect maximum wear control and clean engine internals. Safely extend the period between oil changes while saving money on shop time and waste oil handling.

Clean Engine Internals

A diesel engine oil with extended drain properties has to soot control and maintain clean engine internals. AMSOIL 15W-40 Synthetic Heavy Duty Diesel & Marine Motor Oil contains generous amounts of detergents and dispersants that keep soot neutralized and in suspension. A clean engine runs efficiently and performs to its full potential while preventing soot-related wear.

Improves Mileage

AMSOIL AME 15W-40’s synthetic formula is designed to reduce friction. This leads lower fuel consumption, lower wear and optimum performance.

Less Oil Usage

AMSOIL’s high-end synthetic base oil is resistant to extreme heat which can contribute to oil boil-off with lesser oils. AMSOIL AME 15W-40 minimizes oil usage and maintains its viscosity over a long service life.

Synthetic Cold-Start Protection

Many would assume that 15W-40 synthetic diesel oil would not be the best choice for winter service. That is not the case with AMSOIL 15W-40 Synthetic Heavy Duty Diesel & Marine Motor Oil. With a cold-pour point of -40°C (-40°F), this synthetic diesel engine oil offers fast start-up protection.

15W-40 Synthetic Diesel and Marine Motor Oil Applications

AMSOIL 15W-40 Synthetic Heavy Duty Diesel & Marine Motor Oil is suitable for the following diesel and gasoline engine oil specifications:

  • API CI-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
  • Mercedes-Benz 228.1, 228.3, 229.1
  • MAN 271/3275
  • MTU Type 2

Not suitable for engines requiring the API CJ-4 specification.

Mixing AMSOIL Synthetic Diesel Oil with Other Brands

AMSOIL 15W-40 Synthetic Heavy Duty Diesel & Marine Motor Oil is compatible with all other brands of conventional and synthetic engine oils. While you can safely mix AMSOIL Synthetic Oil with other brands, this will reduce the drain interval and performance capabilities of AMSOIL oil.

The use of any aftermarket oil additives is definitely not recommended.

Service Life

AMSOIL 15W-40 Synthetic Heavy Duty Diesel & Marine Motor Oil is recommended for extended drain intervals in unmodified, mechanically sound diesel and gasoline-fueled vehicles.

Diesel Engine Oil Life Recommendations

Up to three times the oil change interval as recommended by your owner’s manual. Must not exceed 50,000 miles (80,000 km) or 600 hours or one year, unless backed with oil analysis.

Note: When using 5% biodiesel (B5), follow the manufacturer’s oil change interval or support with oil analysis.

Gasoline Engine Oil Life Recommendations

  • Normal Service(1) – Up to 25,000 miles (40,000 km) or one year, whichever comes first.
  • Severe Service(2) – Up to 15,000 miles (24,000 km) or one year, whichever comes first.

(1) Personal vehicles frequently traveling greater than 10 miles (16 km) at a time and not operating under severe service.
(2) Turbo/supercharged engines, commercial or fleet vehicles, excessive idling, vehicles with more than 100,000 miles (160,000 km) without prior continuous use of AMSOIL motor oil, daily short-trip driving less than 10 miles (16 km), frequent towing, snow-plowing, hauling or dusty condition driving.

Note: When using gasoline with an ethanol content of greater than 10%, follow the manufacturer’s oil change interval or support with oil analysis.

Specifications

 AMSOIL Heavy-Duty Synthetic SAE 15W-40 Diesel and Marine Motor Oil (AME)

Kinematic Viscosity @ 100°C, cSt (ASTM D-445)

15.0

Kinematic Viscosity @ 40°C, cSt (ASTM D-445)

106.9

Viscosity Index (ASTM D-2270)

146

CCS Viscosity @ -20°C, cP (ASTM D-5293)

4723

Pour Point °C (°F) (ASTM D-97)

-38 (-3640)

Flash Point °C (°F) (ASTM D-92)

232(450)

Fire Point °C (°F) (ASTM D-92)262 (504)
Four Ball Wear Test (ASTM D-4172B: 40 kg, 75°C, 1200 rpm, 1 hour), Scar, mm

0.36

Noack Volatility, % weight loss (g/100g) (ASTM D-5800)

4.8

High Temperature/High Shear Viscosity
(ASTM D-4683 @ 150°C, 1.0 X 106 s.-1, cP

4.2

Total Base Number

12.1

AMSOIL 15W-40 Synthetic Heavy Duty Diesel & Marine Motor Oil
A synthetic diesel engine oil designed for long oil change intervals, excellent winter performance and improved fuel economy.
Brand: AMSOIL
Manufacturer: AMSOIL
Model: Synthetic Heavy-Duty Diesel & Marine Motor Oil SAE15W-40
Product ID: AME