I have been reading about what you should expect for fuel mileage. I have noticed a steady drop in MPGs over the years. Like 15 years ago I took my 29.5 foot Coachmen on a long trip and got 9 mpg. Now...
If you are interested in non-ethanol gasoline, check www.pure-gas.org it lists over 8400 suppliers in the US and Canada, by state/city and province/city
Around Memphis, there are few stations, but generally the non-ethanol is .20 - 40 cents higher than the same grade of E-10.