To increase the renewable fuel content of gasoline sold in the United States by the year 2025 to 25 billion gallons, and for other purposes.

Amends the Clean Air Act to prescribe: (1) the volume of renewable fuel that gasoline sold in the United States must contain in calendar years 2013 through 2025; and (2) a formula for determining the applicable volume for calendar years after 2025. Repeals provisions requiring a minimum quantity of renewable fuel to be derived from cellulosic biomass. Provides that 1.0 gallon of a fuel blend containing 85% ethanol and 15% gasoline shall be considered to be the equivalent of 1.5 gallons of renewable fuel.