South eastern South Dakota | I've been wondering if I can use 15-40 oil in an old Chevy pu. with a 350 engine in it. I always have that oil on hand for my farm equipment and just this pickup is gas and I put 10-40 in it which I buy just for it. If I need to add a quart I might not have that quart on hand, which is a bothersome little thing.
I know the clearances in the main and rod bearings are the same in gas and diesel engines so what would the difference be?
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