Heavy-duty engine oils for diesel trucks, pickups and off-road equipment

Four synthetic blend multigrades cover the grades these engines call for. Bedrock 15W-40 is the everyday grade for most diesel engines, 10W-30 is the lighter grade for fleets whose engine makers specify it, and 15W-50 and 20W-50 are the heavier grades for engines whose maker allows a heavier oil.

The fifth product, SAE 30 Non-Detergent Motor Oil, is a different kind of oil for a different job: the reciprocating air compressors and small equipment whose makers call for a non-detergent oil. Fleets, owner-operators, repair shops and equipment operators buy the family through Bedrock dealers, in packages from the 1-gallon jug to the 275-gallon tote. Product Data Sheets and Safety Data Sheets for every grade are available on request.

How to choose

• Start with the everyday grade for diesel trucks, pickups and off-road equipment, and for any mixed fleet that wants one oil: Bedrock 15W-40.
• Move to the lighter grade only where the engine maker specifies or allows a 10W-30 heavy-duty oil, as many current on-highway engines do: Bedrock 10W-30.
• Step up one grade when an engine is running hot or using oil on a 15W-40 and the maker's viscosity chart allows a 15W-50: Bedrock 15W-50.
• Reserve the heaviest grade for older or high-hour engines and equipment in constant heat, where the maker lists a 20W-50; it is bought by the tote: Bedrock 20W-50.
• Pick the non-detergent oil only for equipment whose manual calls for it, such as reciprocating air compressors; it is never a truck engine oil: Bedrock SAE 30 ND.