SAE 40 WT Heavy Duty SAE 40 Low Ash Diesel Oil meets or exceeds the performance requirements of API Service Categories CF, and also may be used in applications where API CD quality oil is specified. They are particularly recommended for use in 2-stroke cycle diesel engines in transit buses and marine fleets running on lowsulfur diesel fuel.


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  • 2-stroke cycle diesel engines in bus fleets and marine fleets (SAE 40)
  • Off-highway trucks, heavy equipment and farm equipment • Light trucks and farm equipment with gasoline engines
  • Heavy-duty manual transmissions in trucks and buses where the OEM specifies engine oil


Sinopec Heavy Duty Motor Oil meets or exceeds the requirements of:

• API Service CF (SAE 40)

• API Service CF, SL (SAE 40)

• Detroit Diesel 2-stroke cycle engines (1.0% max. ASH) (SAE 40)

• Excellent soot control for protection against abrasive wear and soot-induced oil thickening

• Protects against sludge and varnish formation

• Protects against scuffing and wear

• Protects against rust and bearing corrosion

• Good resistance to foaming and aeration

• Low-ash content to minimize ash deposits and help keep intake ports clean (SAE 40)