Re: air - fuel ratio

jim wrote:
> 
> 
> Not according to the EPA. They say it contains less energy than ethanol
> per gallon. Density might be different but doesn't matter - no one
> purchases liquid fuel by weight.
> 

You do not purchases liquid fuel by weight. BUT A/F ratio is by weight.
So if the specific gravity of the gas at the pump changes so does your
A/F ratio unless something else changes.