With the purchase of my new 2015GMC Yukon I didn’t realize that FlexFuel is whole different gas!!! I thought it was just in the way the vehicle performs. The price per gallon is cheaper BUT it burns faster so still trying to figure out if it equals the same. My five stars goes to the owner of the station for educating me on the E85(since I buy cars based on looks only lol) and for giving me advise about the gas.