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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I've used Delo 400 15w-40 in my F350 since 99 (Powerstroke with 273k) & in my coach & gene since I've owned it January of 09. Now have 42k on coach & never any problems.
