I am looking for who has the best or lowest percentage of ethanol in their gas. It seems like depending what station that I go to, I get about 1-2 mpg better on average per tank. So far, it seems like Speedway has yielded me the best gas mileage vs a sunoco, a ma and pa place, krogers, and loves. I would rather run 87 with no ethanol but I know there is no chance in hell of that happening but what stations are the next best thing?