I have been using various blends since the late 70's, as have many of my neighbors. If there was going to be any appreciable problem in doing so, we would have come across it. My 1974 Pontiac did just fine on E10 for over 250,000 miles. My '79 Bronco (another carbureted vehicle) did just fine on it for most of it's life. And every vehicle I have had between then and now has gotten E10 all the time, with the flex fuel versions jumping around on various blends. Still waiting for the major pitfall in doing so. Sure, you will find some occasional anecdotal stories of ethanol causing a major problem, but usually, when all things are considered, it had more to do with the negative condition of the engine and fuel system already, or a serious goof in fuel management and storage. Leaving E10 in a vented container or vented fuel tank for quite a while in humid weather is pretty stupid. And a fuel system that has a lot of varnish and other buildup in it will get a major cleaning out with E10 and can have a detrimental effect on filters and carbs. But it wasn't the fuel's fault, it was other things.
But it all comes down to one's comfort level. If one just cannot stand the idea of ethanol in their fuel, then don't buy it. If your state doesn't allow E0, then either live with it or move. Better yet, put leverage on your hired help at the state capitol. There is no mandate by the Feds that all fuel must have ethanol, nor is there any ban on ethanol free. That is a state directed or city directed issue. I can get ethanol free regular and premium all around me in almost every town at the majority of filling stations. If there was a ban of E0 by the feds, I should be seeing it. But even with all the ethanol free around me, ethanol blends outsell it by several margins according to state data. We just don't suffer from enlarged paranoia glands.
