ethanol is all gas nowadays, its a way for the gas companies to make more money. Cheaper for them and you get less mileage. They just decided to be nice and mark how much. LOL. The cheaper gas stations run more in theres. I wanna say theres an average of about 5-15% ethanol in all gas (Can't remember exactly at the moment). Unless theres something like 30%+, you really dont have to worry about much.