I'm still trying to figure out how the country is going to pay for an increase in mandated ethanol since it is already subsidized. It costs much more to produce than gas. those of you getting better gas mileage on premium vs regular gas must not have ethanol in the premium or else you are snorting fairy dust because you will not get better gas mileage. . . . . thats not how octane works. I wish I could run ethanol free premium, but its illegal here in MN except for small engines and collector cars. Not sure the mileage improvement could make up for the cost increase though.