Originally Posted by miked.
orielly's has a sale on their delo 15 40 motor oil. is it any good? just wandering.
Delo, Rotella, Delvac etc etc... it is hard to make a CJ-4 oil that isn't good. Personally I run whatever name brand 15w-40 is on sale that the time during the spring, summer and fall. I run a diesel rated 10w30, usually rotella T5 in the winter.