E85 (Flex Fuel)

Photo of an E85 pump.

E85 (or flex fuel) is a term that refers to high-level ethanol-gasoline blends containing 51% to 83% ethanol, depending on geography and season (see Fuel Properties and E85 Flex Fuel Specification). It can be used in flexible fuel vehicles (FFVs), which are available from domestic and foreign automakers. Use the Vehicle Cost Calculator to look up FFV fuel economy, fuel costs, and greenhouse gas reductions.

Other than lower miles per gallon, motorists driving FFVs will see little difference when using E85 versus gasoline. Depending on the actual ethanol content, E85 has less energy per gallon than gasoline to varying degrees (the impact on fuel economy lessens as the ethanol content decreases).

E85 Stations

There are more than 3,300 public E85 stations in 42 states that offer high-level ethanol blends to the nearly 21 million FFVs on U.S. roadways. The U.S. Department of Agriculture's Biofuels Infrastructure Partnership program provided $210 million to fund the installation of new ethanol infrastructure at more than 1,400 stations in 20 states. Installations began in 2016 and will continue into 2019, which will significantly increase the number of stations selling both E15 and E85. Find E85 Fueling Station Locations near you.

There are additional regulations for stations selling blends above E10. For more information, visit the Codes, Standards, and Safety page.