I recently found a conveniently located station that sells ethanol free gas. Cost is $3.72, as of yesterday, vs. $3.65 at the cheapest regular station.
I do drive economically, with good result. Over the last 41,000 miles, my average mileage is 17.67 MPG (yes, there's an app for that!). My last 4 tanks have been ethanol free, about 1000 miles. MPG for those has been 20.35, 19.33, 20.15, and 19.97 MPG.
I'm paying 2% more for 13% increase in MPG.
http://forum.ecomodder.com/images/icons/icon10.gif
And this is in a full size Dodge Ram V8 pickup.
YMMV, but it's worth a try.