Ethanol vs. Your Engine

[ClassicVW_imp]

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.

But somehow the net loss of MPG in real world use is 10%.