I'm looking at eventually getting a Steeda CAI and tune. Right now I have about 800 miles on my car and I've been running 93 octane the whole time. However, the only place I can find 93 octane has 10% ethanol in it. Is there much of a power difference between running 93 and 91 octane? I'm guessing there's no real difference unless it's tuned but lets assume I'm talking about after I get the CAI/tune. What about gas mileage? I've read you get better mpg without ethanol.

 

Do you have a long term easily accessible source for methanol free gas?

They are making less and less alcohol free gas every day, soon you won't find any.

Best bet is to just not worry about using the alcohol free stuff.

 

I was wondering if that's what I should do but there are still currently a couple of stations offering 91 octane without ethanol. Even one who recently changed their regular over to 10%.