I live in the Kansas City area and had been buying my gasoline on the Mo. side for several years because it was always 10 cents cheaper there due to higher Kansas taxes. Starting about a year ago I noticed our cars were getting fewer mpg. Seemed like as much as 3-4 mpg fewer. I found out recently all Mo. gas is now 10% ETOH & they don't have to tell you on the pump.......switched to Kansas gas......wow.....getting much better mileage now.....Crossfire went from 23.2 mpg to 27.1mpg!!!!!!!!!!!!!! It's worth the extra 10 cents for real gas!!! Since the switch I've driven 575 miles on 21.2 gal. =27.1 mpg. I'm convinced top horsepower is improved too!