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...
Forum Discussion
Delo LE 15-40W is the best oil for your Cummins. It has all the good additives including moly that other diesel oils do not have. In all my oil analysis it held up the best.
