The U.S. Environmental Protection Agency (EPA) defines E15 as gasoline blended with 10.5%-15% ethanol. In 2011, EPA approved E15 for use in conventional vehicles of model year 2001 and newer, through a Clean Air Act waiver request, based on significant testing and research by the Department of Energy’s Vehicle Technologies Office. Stations are not required to sell E15. E10 remains the limit for passenger vehicles older than the 2001 model year and for other engines and vehicles that use gasoline, such as lawn mowers, motorcycles, and boats.

Vehicles approved for E15 use:
  • Flexible fuel vehicles
  • Conventional vehicles of model year 2001 and newer
Vehicles prohibited from using E15:
  • All motorcycles
  • All vehicles with heavy-duty engines, such as school buses and delivery trucks
  • All off-road vehicles, such as boats and snowmobiles
  • All engines in off-road equipment, such as chain saws and gasoline lawn mowers
  • All conventional vehicles older than model year 2001

There are several EPA requirements and regulations that fueling stations must adhere to when selling E15. The most significant requirements are implementation of a misfueling mitigation plan (MMP). Misfueling is a concern for conventional vehicles older than 2001, and an MMP reduces the risk of misfueling. For more information on these requirements, see the Handbook for Handling, Storing, and Dispensing E85 and Other Ethanol-Gasoline Blends.

E15 is not yet widely available. It is sold in a few Midwestern states by stations that already offer E85.