Car source Kelley Blue Book goes green

With options growing for fuel-efficient cars, Kelley Blue Book offers a "green" buying guide and picks its top 10 most fuel-efficient cars, half of which are hybrids.

Correction, 1:35 p.m. PDT: This story initially misspelled the name of the company known for its car buying guide. It is Kelley Blue Book.

The company known for supplying the "blue book" value of cars is turning green.

Kelley Blue Book on Thursday introduced a section to its Web site for sorting through the many options for buying fuel-efficient cars.

Click on image to see a photo gallery of upcoming electric cars. CNET Networks

There are, of course, hybrid cars that run partially on batteries. Plug-in hybrids, such as the Chevy Volt and models from Toyota, are expected in the next two years. The Tesla Roadster, a $100,000 sports car, recently starting shipping to customers.

Automakers, particularly GM, are pushing flex-fuel vehicles that can run on e85, an ethanol-gasoline mixture. Diesels, meanwhile, claim to be cleaner, quieter, and better than previous versions.

But Kelley Blue Book editors' top 10 picks for "green cars" included five hybrids. Below is its top 10 list of cars with each one's combined city and highway miles-per-gallon rating.

2008 Toyota Prius, 46 mpg

2008 Honda Civic Hybrid, 42 mpg

2008 smart fortwo, 36 mpg

2008 Nissan Altima Hybrid, 34 mpg

2008 Mini Cooper, 32 mpg

2008 Ford Escape Hybrid, 32 mpg

2008 Honda Fit, 31 mpg

2008 Mercedes-Benz E320 BLUETEC, 26 mpg

2008 Toyota Highlander Hybrid, 26 mpg

2008 Chevrolet Tahoe Hybrid, 21 mpg