Dangerous or dubious?

Chevy Aveo – 24 mpg

When cold weather rolls in, it automatically takes a chunk from your gas mileage, but a hidden culprit might be a sudden reduction in your tire pressure.

If you’re in the market for a new 2007 or 2008 model, these are the most fuel efficient cars currently for sale:

Scion xD. Photo from Road & Track 
 
Best  Wagons/Crossovers for 2007 & 2008
 
Pretty similar line-up from year to year, with the exception of the introduction of the 2008 Scion xD. FYI, I test drove a Pontiac Vibe yesterday, and it took a few tries start in the 11º F weather.
2007 Models
Pontiac Vibe
4 cylinder, 1.8 L engine, Automatic 4-speed
25 mpg city/ 31 mpg hwy
Toyota Matrix
4 cylinder, 1.8 L engine, Automatic 4-speed
25 mpg city/ 31 mpg hwy
Suzuki SX4
4 cylinder, 2 L engine, Automatic 4-speed
22 mpg city/ 30 mpg hwy
Audi A3
4 cylinder, 2 L engine, Automatic S6
22 mpg city/ 29 mpg hwy
Suzuki SX4 AWD
4 …read more

Top Five Family Sedans for 2007 & 2008

you can have what you want – even a Hummer! – and be eco-friendly, too

I read about the sporty new Corolla, the increased power, and the additional luxury features and thought it was going to take a hit in mpg and emissions. How did I know?