Intermediate-Level Blends of Ethanol in Gasoline, and the Ethanol “Blend Wall”

This report discusses the growing interest in the potential for ethanol to displace petroleum as a transportation fuel, as well as related issues, including the current Clean Air Act (CAA) limitation on ethanol content in gasoline; the requests of ethanol producers for an increase of this limitation; and the effects the limitation has upon vehicle and engine warranties and the infrastructures of the automobile and fuel industries.