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D5526+D15W40
especially under tough conditions
92% Efficiency Rating - Efficiency SAE J1985 3rd-Party Test Results
Doc's Diesel 15W-40 Full Synthetic Heavy Duty Diesel Oil is specially engineered for today’s hard-working diesel engines - whether you're running a new emissions-compliant rig or keeping an older workhorse in the game
Ideal for removing protective shipping oils before installation
Doc's Auto Parts Engine Air Filter DA5421 Count:1 D5526+D15W40Docs Auto Parts Engine Air Filters: Doc's Auto Parts Premium Engine Air Filters are built for reliable performance and everyday durability. They help block dirt, dust, and debris that can cause premature engine wear, keeping clean air flowing to your engine. A high quality silicone gasket creates a secure seal, even in harsh or dusty driving conditions, while deep pleated filter media captures more contaminants to support smoother operation, improved