Ethanol is more expensive than 100% gas, I tested it in my car. I gained about 11% in mileage, while paying about 2.7% more for the 100% gas.
This was based on 10 cent more per gallon over ethanol tainted gas, but I found a station that only charges 2-3 cents more than the ethanol-tainted gas at 7-11, so it blows away the value of the ethanol junk coming out of those pumps.
There is usually non-ethanol gasoline in most locations. Just look it up. There’s a link to one site in the blog. I’m sure there are others as well.
Non-ethanol gas gets (according to the government) 3-4% fewer mpg. I think it’s not that good and I’ve heard anecdotal of 15% better without ethanol.