Cummins ISL Oil recommendation
Getting ready for my first service, and I see the shop offers standard oil, semi synthetic, or full synthetic. Terrific :) Any idea what would be the best oil for the ISL that operates as a vacati...
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My motor gets Valvoline Blue. If its good enough for the Cummins factory to use, its good enough for me. I change my own oil so its cheap enough to go with the good stuff.
