Home / Doc's Diesel 15W-40 Semi Synthetic Heavy Duty Diesel Engine Oil, API CK-4, for Cummins Powerstroke Duramax, DPF and EGR Safe | 55-Gallon Drum

Doc's Diesel 15W-40 Semi Synthetic Heavy Duty Diesel Engine Oil, API CK-4, for Cummins Powerstroke Duramax, DPF and EGR Safe | 55-Gallon Drum

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  • Detail
    • Engine Compatibility: Heavy duty diesel engine oil for modern and older diesel trucks, fleet vehicles, and equipment; suitable for Cummins, Powerstroke, and Duramax engines; safe for diesels with DPF, EGR, and SCR emissions systems
    • Semi Synthetic Protection: Resists oxidation and thermal breakdown under high heat and heavy loads; stay-in-grade shear stability holds viscosity when towing; synthetic blend balances heavy duty protection and value; controls deposits and oil consumption
    • Specifications: Meets or exceeds API CK-4 and is backward compatible with CJ-4, CI-4 Plus, CI-4, and CH-4; meets Cummins CES 20086, Mack EOS-4.5, Volvo VDS-4.5, Detroit DFS 93K222, Caterpillar ECF-3, ACEA E6/E9, MB 228.31, and MAN M 3575
    • Oil Change Intervals: Follow your manufacturer schedule first; standard service up to 10,000 miles, 15,000 max; severe duty such as towing or dust up to 7,500 miles, 10,000 max; off road or equipment 250 to 500 hours
    • Sizes and Doc's Diesel Filters: Order in 1, 2, 3, and 4 gallon jugs, 55 gallon drums, or 192 gallon skids to match your fleet; pair with Doc's Diesel oil, fuel, air, and cabin filters, to meet or exceed OEM standards
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