Maybe a fuelish question?

kaydeejay wrote:

agesilaus wrote:
Ethanol gets 20-25% lower mileage than pure gasoline. So if you are burning 85% gas/15% EtOH then you'd get 3-4 mpg less than pure gas. I think that's what the OP was asking.

That's the way I read the question and I agree with the comment.
What Premium does NOT have Ethanol? I thought the Feds legislated 10% in ALL gasoline.:h

In town a few stations have non-ethanol premium. If you drive to Heston the Casey's has regular without ethanol.

Not all gas has ethanol but it cost more.