In the past it’s been normal for me to see E-85 usually around 0.15-0.25 less per gallon than regular unleaded.
Unless your vehicle specifically says it can run on Flex Fuel, do not put it in your tank or your fuel lines/seals may hate you for it.
It keeps the engine cleaner than normal fuel at the cost of about 2-5 mpg less efficiency, depending on your travel.
