Ethanol was first pushed as a “partially oxygenated” fuel which would reduce CO2 emissions, and as a “renewable” fuel. It does have a beneficial effect on octane rating.
It is a net loser on emissions when the entire ethanol production life cycle is examined. It reduces fuel economy, which really makes it a loser for drivers.
And its effect on the food supply is reflected in outrageous food prices.
E85 has not been a big hit. E15 is bad news for fuel economy. But ethanol is big bidness for some of the midwestern states, and it will be pushed hard from now on.
E10 is just as bad.
I have a 2011 Hyundai Genesis Coupe -- was getting around 18.3 MPG around town. Local Entec stations have started offering Ethanol free 87 Octane recently.
After just 2 tanks of E FREE I am getting 21.6 MPG.
I don’t believe it raises prices that much, everything ends up in the feedlot at the end of the day. Estimates have been made that indicate it might raise the price of corn about $.20 within a 150 mile radius of the ethanol plant. I don’t use it unless I have to because it does lower fuel economy.