dino oil vs synthetic mpg
has any one when from dino oil to full synthetic oil & had better m p g & what oil & how much better m p g did you get ? i have 2011 chevy 2500 Duramax pulling 35 ft 5th wheel..
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tks for the replays , i'm using delvac now, it seams it uses 1 qt every 3,000 miles & other engines ive used mobil oil in have used oil, switched to castrol oil & doesn't use as much, synthetic would be better , may not be worth changing .
