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orielly's has a sale on their delo 15 40 motor oil. is it any good? just wandering.
 

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yes, delo is a good oil but i wouldn't want to switch back and forth. pick one brand and stay with it
 

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I've used both and my truck seems to prefer the Delo over the Rotella.
Runs a little smoother. Could be all in my head though :)
 

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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.
 
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