Renewable Fuel Standard (RFS)

The RFS is the 2005 law that requires the blending of biofuels such as corn-ethanol into our gasoline. When written, it assumed that America's use of gasoline would continue to rise and mandated escalating amounts of biofuels to be blended with our fuel. Since 2005, gasoline usage has actually dropped steadily and now the law forces more ethanol into less gasoline.

To keep up with this mandate, in 2010 the EPA permitted E15 (fuel containing up to 15% ethanol) into the marketplace. Even though E15 is prohibited from being used in marine engines, snowmobiles, motorcycles, small engines like lawnmowers and leaf blowers, as well as any vehicle made before 2001, this fuel can now be found in at least 23 states at the very same pumps as E10 and ethanol-free gasoline. (In fact, there is not a single marine engine warrantied to run on any fuel over 10% ethanol.)

Additional RFS Information

The Outlook for the Supply of Ethanol-Free Fuel

Smarter Fuels Future e-15