So I was digging in my shop and found 2gal of CH-4 and 3gal of CI-4 Delvac 1300 oil. Obviously it’s been sitting there a while, but not more then 7years I don’t think. Is the additives and detergents still good? I’ll be using it in my 2006 Duramax that doesn’t see much use. I think I was mixing the older oils in with the newer stuff due to the changes in the CJ and Ck oils and well maybe it’s been sitting too long now.
Last edited by Dozerboy; 06/26/20 05:29 PM.