I'm with Enigma; call me an 'ethanol hater'... since every older engine I've put ethanol fuel in has degraded to a 'not running' condition before I had to replace fuel lines, clean carburetors/tanks/etc. Doing that and running 'non ethanol' fuel restores them to trouble-free operation. To be noted: The engines I've had problems with are in older cars (that sit for months at a time), and all my 'summer-use small engines' (lawnmowers, tillers, weedeaters, blowers, hedge trimmers, etc)...
PS. In my recent trip in the 56 Nomad to the TriFive Nationals (about 175 mile trip), I left here with a full tank of 'non-ethanol' and got 18.8 mpg. Coming home with 'ethanol fuel', I got 17 mpg. That's exactly 10% difference (which coincidentally is the percentage of ethanol in the fuel I purchased). Ethanol in our gasoline is another of the 'politically expedient' SCREWUPS put on the citizenry of this country by our politicians! (You can add this to the 'airbags', etc.. and other 'safety related mandates by the federal gov't). They make the headlines, and WE pay the bills, and suffer the consequences!