I really don't want in this fight, but ethanol is burning part of our food supply, not good.
I also have seen studies, not media comments, that say that ethanol costs more to produce than it supplies. In fact gas mileage goes down around 10% when using it. This does need to be figured into the equation.
This I see in PA when it begins showing up in the spring at all service stations, my mileage drops somewhat due to the alcohol content.
I have never had an engine problem because of it though.
My Chevelle may feel differently some day though.
Most studies that show an energy loss do not allow for the feed that is left over.
I believe 10% is an exaggeration. 2-3% is more realistic and studies have shown this. A 10% reduction would mean the ethanol is adding nothing, energy wise, to the blend.