- E15 is a blend of gasoline and up to 15 volume percent ethanol.
- FFVs, MY 2001 and newer cars, light-duty trucks, and medium-duty passenger vehicles SUVs may use E15.
E15 is a blend of gasoline and up to 15 volume percent ethanol. On October 13, 2010, the Environmental Protection Agency (EPA) granted a partial waiver for E15 use in model year 2007 and newer light-duty motor vehicles (i.e., cars, light-duty trucks, and medium-duty passenger vehicles) subject to certain conditions. In January 2011, the EPA granted a second partial waiver for E15 use in model year 2001–2006 light-duty motor vehicles. Until the EPA granted the waiver, the amount of ethanol in motor vehicle gasoline was limited to 10 volume percent (E10). E10 was granted a waiver under Clean Air Act 211(f)(4) more than 30 years ago and is now makes up over 90 percent of the U.S. gasoline market.
The primary source of ethanol is corn, but other grains or biomass sources may be used as feedstocks.
On June 10, 2019, the EPA finalized a rule to allow the use of E15 all year long, and not just during the summer months.
What Vehicles May Use E15?
- Flexible-fuel vehicles (FFVs)
- Model year (MY) 2001 and newer cars
- MY 2001 and newer light-duty trucks
- MY 2001 and newer medium-duty passenger vehicles sport utility vehicles (SUVs)
What Vehicles and Engines May Not Use E15?
- All vehicles with heavy-duty engines, such as school buses, transit buses, and delivery trucks
- All motorcycles
- All off-road vehicles, such as boats and snowmobiles
- All engines in off-road equipment, such as lawnmowers and chain saws
- All MY 2000 and older cars, light-duty trucks, and medium-duty passenger vehicles (e.g., SUVs)
A major concern with E15 is the possibility of “misfueling,” or the inability of an engine to use E15. Therefore, the waiver calls for all E15 retailers to have a label that informs consumers about which vehicles can use E15.