A flex-fuel vehicle is specially designed to run on any ethanol blend up to 85 percent ethanol. Special onboard diagnostics "read" the fuel blend, enabling drivers to fuel with E85 or gasoline in any combination. The computer adjusts the vehicle's fuel injection and ignition timing to compensate for the different fuel mixtures.
For more information on flex-fuel vehicles, including stations that sell E85, see http://www.in.gov/isda/biofuels/. Indiana State Department of Agriculture, 317/232-8769