Car-shopping website Edmunds.com forecasts that U.S. car and light truck sales in November totaled 1.1 million vehicles.

FORBES: November Car Sales Rate Likely Best Since February 2008

Buy a good hybrid car or light truck and drive it right, and you'll halve your oil use per mile.

CNN: Freeing America from its addiction to oil

Chrysler's PT Cruiser, a pip-squeak of a car that would have trouble hauling a rowboat, is classified as a light truck under the rules because the back seat folds flat to better carry cargo.

FORBES: The Gas-Guzzler Relief Act

Current CAFE calls for automakers' passenger car fleets to average 27.5 miles per gallon, and their so-called "light-truck" fleet to average 21.0 miles per gallon.

FORBES: The Gas-Guzzler Relief Act