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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Years ago, I documented better mileage using Mobile One compared to then regular oil. There was a measurable difference in mileage. But not so much with modern dino oils.
