A bill to amend the Clean Air Act to require the Administrator of the Environmental Protection Agency to prescribe regulations to promote greater fuel economy in motor vehicles subject to Federal emission standards.

Directs the Administrator of the Environmental Protection Agency to prescribe regulations under the Clean Air Act for preventing a decrease in fuel economy of motor vehicles. Provides that such regulations may include: (1) mandatory labeling of fuel economy of each motor vehicle or engine; (2) establishment of fuel economy performance standards; (3) limitations on the use of equipment which increases fuel consumption; (4) limitations on motor vehicle weight; and (5) limitation on use of emission control systems.