I completely agree with this. Unless your engine runs everyday due to the commute, I wouldn't even think about ethanol in my fuel. I put effort into finding ethanol-free gas for my Volt. One tank lasts me over 6 months under normal use and ethanol fuel gums up in time.I don't believe GM ever certified the car for it. The engine is apparently capable of handling it - it doesn't follow that the rest of the car is. I'd be especially uncomfortable with the hydrophilic ethanol sitting in the tank for a year as gas can on a Volt.