On Sunday, July 19, 2015 at 11:32:16 AM UTC+8, Ashton Crusher wrote:
> And all the experts say the higher octane fuel
> actually has less energy in it so if I could have found alcohol free
> 87 octane I'd have probably gotten even better gas mileage.

Who are these experts?
Hexane, heptane, octane and nonane have very similar energy content,
within 1%
Ethanol is significantly less. In gasohol, the refineries would
dump more heptane in, and the alkane mix would have pretty much the same
energy content, but the ethanol would drag it down.
What percentage of ethanol was the stuff you put in?
For E10, the MPG would only be a few percent less.