I am far from being an expert, but doesn't burning a molecule of ethanol produce two molecules of CO2 and 3 molecules of water? How do we get hydrocarbons in this? Is it because of the benzene used in dehydration?
Any chemists out there who care to clarify this?
On a side note, I just checked if my car is compatible with E85 blends (85% ethanol and 15% gasoline) and it's not. I guess no increase in power for me.