Political joking sure does irritate some people. But ethanol is bad for older cars. This is an article from the Renewable Fuel Association which is obviously pro Ethanol. But it does talk about fuel line problems, proper storage (which it doesn't go into) and that ethanol absorbs water which is my big complaint). Airplane pilots can get an STC to run car fuel in their airplane. You would be hard pressure to find a pilot that would use E-10 in their plane. Read the pro Ethanol article and see if you can see problems
http://www.ethanolrfa.org/pages/ethanol-facts-engine-performance
Note: Moss motors talks about it. New car actually say they are compatible with E-10. Doesn't that mean that some cars may not be compatible with Ethanol?