03-24-2015, 12:52 AM
Looks like there are lot of myths about ethanol afloat. 
However, there is a little bit less energy in E10, as ethanol has about 2/3 of energy of gas. But then, it's only 10 % oberall and btw. at least here in Europe gas contained already about 5% ethanol for the last 40 years or so for some reason.
So it ends up in 1/3 of 5% less energy in E10, compared to E5 (or regular), which is less than 2% per gallon.
However, there is a little bit less energy in E10, as ethanol has about 2/3 of energy of gas. But then, it's only 10 % oberall and btw. at least here in Europe gas contained already about 5% ethanol for the last 40 years or so for some reason.
So it ends up in 1/3 of 5% less energy in E10, compared to E5 (or regular), which is less than 2% per gallon.