"The domestic car manufacturers have already begun their transition and are prepared to build high-quality cars and trucks that demonstrate greater fuel efficiency and satisfy consumer demand. Chrysler, Ford and General Motors are building leaner, greener advanced technology vehicles, including hybrids and alternative-fuel vehicles, and have developed plug-in hybrid technology like that employed by the Chevy Volt.

"The Corporate Average Fuel Economy standard provides an essential national standard that ensures that manufacturers are able to provide a fuel efficient vehicle fleet that is compliant with the ambitious uniform standards set by the Energy Independence and Security Act of 2007. Particularly in a time where car sales have fallen drastically, imposing multiple fuel economy requirements on the automotive industry could have long-lasting detrimental effects."