What do flexible fuel vehicles run on

Enter vehicle or phrase. Flex-fuel Vehicles. Some capless fuel fillers have a yellow ring around where you insert the fuel nozzle. Check the Fuel Door. Some FFVs have labels on the fuel door indicating fuel type. Check Your Owner's Manual.

Look for Badges on Your Vehicle's Body. Also In This Section…. The engine control module ECM is also calibrated to accommodate the higher oxygen content of ethanol. Learn more about flex fuel vehicles.

Electronic control module ECM : The ECM controls the fuel mixture, ignition timing, and emissions system; monitors the operation of the vehicle; safeguards the engine from abuse; and detects and troubleshoots problems. If you do so accidentally, empty your tank and refill it with regular gas and you'll be fine.

Sign up for our Newsletter! Mobile Newsletter banner close. Mobile Newsletter chat close. Mobile Newsletter chat dots. Mobile Newsletter chat avatar. Mobile Newsletter chat subscribe. Fuel Efficiency. Fuel-saving Devices. How Flex-Fuel Vehicles Work. Flex-fuel vehicles run on different blends of fuels, most frequently a mixture of gasoline and ethanol, a type of alcohol. Want to learn more? Check out these alternative fuel vehicle pictures!

The Mechanics Behind Flex-Fuel Vehicles A flex-fuel car looks just like any other kind of car -- which is why some people don't even realize they own one. The main ethanol blends on the market today are E85 and E95, which get their names from their compositions: E85 is 15 percent unleaded gas and up to 85 percent ethanol, while E95 -- typically used in diesel-powered vehicles -- is up to 95 percent ethanol [sources: Bionomic Fuels , Clean Air Trust ] Advertisement.

Author's Note I don't own a flex-fuel vehicle. Alternative Fuels Data Center. What Does It All Mean?