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Old 10-19-2017, 10:09 AM   #4 (permalink)
roosterk0031
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Join Date: Jan 2011
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I can't tell what fuel I have in my Cobalt, hasn't had E0 in years, but from E10-E60 runs the same. Been running E15 most of the time since it came available close by and 0.10 cheaper(4-5%) than E10, I might be loosing a 1-2% of mpg, I'm not consistent on filling or driving and throw in 1/2 tank of E85 when the price is right.

I got crazy good MPG from one particular E15 pump for a while. I've deleted most of those fills from my log.
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