gas mileage
#2
RE: gas mileage
I keep a mileage/repair log and calculate mpg for each tank. I never used regular, but I have seen no mpg difference between midrange (89) and premium (91 or 93). Possibly performance would be better, but I do not run the car that hard. I have seen poorer mpg when I'm forced into using gas with 10% ethanol.
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jinsojoo
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