Great for add-in make up oil, but I'd prefer to use a semi-synth for an oil change.
Originally Posted By: TallPaul
My favorite is Nextgen.
But I would run Maxlife over White Bottle.
If the price is right, though, I'll run white bottle.
Best MPG should be Synpower (among Valvoline oils) and of course, running thinnest grade specified for your engine.
On balance, MPG is likely not going to be significantly noticed. Just run Valvoline and be content that it is good for your engine.
I never notice much mpg difference except maybe if the grade oil is vastly different (like 5w30 to 15w40). mpg varies quite a bit from season to season; so you have to compare like temperatures with like temperature, and because I don't do enough driving there just aren't enough datapoints.