fuel efficiency
The latest news on fuel efficiency
New data on the automakers' future plans reveal the best and worst mpg.
Two government documents provide the core data.
As the government clarifies mpg standards, some automakers face a steep "mileage gap."
The White House's proposal exceeds what Congress required, but gives new flexibility to automakers.
Truck auxiliary power units curb diesel waste, but the price tag can be a hurdle.
Cars With the Best 'Muscle Per Gallon'.
Here's our take on which cars offer the best—and worst—mix of performance and fuel economy.
We rated cars' mix of performance and fuel economy (the muscle per gallon index).
We rated cars' mix of performance and fuel economy (the muscle per gallon index).
We rated cars' mix of performance and fuel economy (the muscle per gallon index).
