Already a fuel-efficient car, Saturn's flagship sedan, the Aura, is about to get a little greener. That's because by late 2008, the Aura will be available equipped with General Motors' hybrid powertrain. This 2.4-liter, four-cylinder engine, paired with an electric motor, will help the Aura squeeze a few more miles from a gallon of gas.
And while the benefits to the already-efficient car aren't earth-shattering, it does bring the EPA ratings to 26 mpg city and 34 mpg highway -- four miles better in the city and eight miles better on the highway. What's more, it gives this boost at a price that is thousands below many other hybrid sedans.