AMSOIL Signature Series 15W-40 Max-Duty Synthetic Diesel OilA premium full-synthetic 15W-40 diesel oil that meets the API CK-4 diesel oil specification. Exceeds the phosphorus requirements of the Ford WSS-M2C171-F1 spec. Suitable for all model-year Ford Power Stroke diesel engines. This product replaces the API CJ-4 “AMSOIL Premium 15W-40 Synthetic Diesel Oil”. Suitable for newer or older diesel engines.

Synthetic Diesel Oil Package sizes include:
1-Quart Bottle (or buy case of 12)
1-Gallon Bottle (or buy case of 4)
2.5-Gallon Bottle (or buy in twin pack)
30-Gallon Drum, 55 Gallon Drum or 275-Gallon Tote

Oil Depot can offer AMSOIL Signature Series 15W-40 Max-Duty Synthetic Diesel Oil at wholesale prices in Canada or the United States. Request a wholesale price list using the contact form on this page.

AMSOIL Signature Series 15W-40 Max-Duty Synthetic Diesel Oil Applications

  • API CK-4/SN, CJ-4, CI-4+, CF
  • Chrysler MS 10902
  • Ford WSS-M2C171-F1
  • Volvo VDS4.5, VDS4, VDS3
  • Mack EOS-4.5, EO-O
  • Renault RLD-4, RLD-3
  • Cummins CES20086, CES20081
  • Caterpillar ECF-2, ECF-3, ECF-1-a
  • DDC 93K218, 93K215, 93K214
  • DFS 93K222
  • ACEA E9, E7
  • MB 228.31
  • MAN 3575
  • MTU Type 2.1, II, I
  • JASO DH-2
  • Deutz DQC III-10LA
  • Scania LA-2

Features and Benefits Of AMSOIL Signature Series 15W-40 Max-Duty Synthetic Diesel OilDetroit Diesel DD13 Engine Scuffing Test Pictures

  • No-compromise wear control
  • Strong resistance to volatility
  • Engineered to withstand extended drain intervals
  • Pours down to -40
  • Resists engine deposit formation

The Latest Wear Control Technology

The Detroit Diesel DD13 Engine Scuffing Test measures the ability of an engine oil to resist ring and cylinder bore scuffing. Signature Series 15W-40 Max-Duty Synthetic Diesel Oil outperforms the minimum standard of this lab test by a 600%. Signature Series 15W-40 is the culmination of AMSOIL’s 45 years of synthetic engine oil design excellence.

Stays in Grade, Reduces Oil Usage

The API CK-4 specification dictates improved volatility resistance for diesel engine oils. AMSOIL over-delivers with Signature Series 15W-40 Max-Duty as it beats the API CK-4 volatility guideline by 76%. These means less oil consumption during extended periods of extreme heat and heavy loads.

Reliable Winter Performance

Signature Series 15W-40 Max-Duty Synthetic Diesel Oil boasts and outstanding cold-pour-point of -40°C (-40°F). This elite synthetic 15W-40 delivers honest four-season performance.

Service Life Of AMSOIL Signature Series 15W-40 Max-Duty Synthetic Diesel OilAMSOIL Signature Series Diesel Oil Consumption Chart

Diesel Engine Oil Life Recommendations

Turbo-Diesel Pick-up Trucks (except 2007-2010 models)– Two times the manufacturer’s oil change interval to a maximum of 40,000 km/25,000 miles or one year.
2007-2010 Dodge/Cummins 6.7L, Ford PowerStroke 6.4L, GM Duramax 6.6L– Must follow the manufacturer’s oil change interval. This is due to potential fuel dilution issues.
Heavy Duty Engines/Off-Road Equipment– Three times the manufacturer’s oil change interval to a maximum of 40,000 km/60,000 miles or 600 hours or one year (whichever comes first).
2007- 2009 Caterpillar C13 and C15 Highway Engines– Must follow the manufacturer’s oil change interval. This is due to excessive fuel dilution.

Note: Do not extend oil change intervals when vehicle is operated in the following situations. Oil change intervals may be extended when supported with oil analysis.

  • Severe service applications (see vehicle owner’s manual for “severe service” definition).
  • When engine is heavily modified.
  • When 15% biodiesel (B15) is used.

Gasoline Engine Oil Life Recommendations

Up to two times the oil change interval as recommended by your owner’s manual to maximum of 15,000 miles (24,000 km) or one year, whichever comes first.

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

Mixing AMSOIL Synthetic Diesel Engine Oil With Other Brands

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

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

 

Specifications of AMSOIL 15W-40 Signature Series Max-Duty Synthetic Diesel Oil (DME)

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

15.6

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

112.4

Viscosity Index (ASTM D-2270)

147

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

4134

Pour Point °C (°F) (ASTM D-97)

-40 (-40)

Noack Volatility (DIN 51581) 250°C for 1 hour, % weight loss

5.1

Total Base Number

10.1

High Temperature/High Shear Viscosity, cP (ASTM D-6481)

4.5

Sulfated Ash Content, wt. %

1.0

AMSOIL Signature Series 15W-40 Max-Duty Synthetic Diesel Oil
A premium, 100% synthetic 15W-40 diesel motor oil the meets the API CK-4 specification.
Brand: AMSOIL
Manufacturer: AMSOIL
Model: Signature Series 15W-40 Max-Duty Synthetic Diesel Oil
Product ID: DME