It takes more energy to make ethanol than the energy it produces. Do a search on the net. It's pretty funny.
I was reading another funny article which illustrated if our cars all ran on 90% ethanol the entire US would need to be covered with corn fields to support the ethanol used. We'd have nowhere to live. Worse yet they would need to import
oil to make the ethanol. LOL
Here's on article
http://healthandenergy.com/ethanol.htm