To prohibit the Administrator of the Environmental Protection Agency from granting a waiver under section 211(f)(4) of the Clean Air Act for any fuel or fuel additive that will reduce fuel efficiency or cause or contribute to engine damage.

Amends the Clean Air Act to prohibit the Administrator of the Environmental Protection Agency (EPA) from granting a waiver from prohibitions concerning new fuels and additives in light duty motor vehicles for any fuel or fuel additive that will: (1) reduce the fuel efficiency of the vehicle or engine, or (2) cause or contribute to any damage to the vehicle engine.