Got a flex-fuel car and can't easily figure out if E85 or gasoline is the best economical choice? Use this app to figure out how to always make the right decision at the pump. Simply enter your car's fuel economy or consumption, your average monthly driving distance and your local fuel prices. FFCalc will automatically tell you which fuel to use. Make the smart choice just once and this app pays itself off!

If your car has a yellow fuel tank cap labelled "E85/Gasoline", you have a flex-fuel vehicle that runs on gasoline, ethanol or any combination or the two. Download FFCalc today and start saving money by always making the smarter choice at the pump!