The latest news on fuel efficiency
Researchers find that real-time eco-driving can cut fuel consumption up to 6 percent.
Algae might keep jet airplanes and cars running someday.
By 2016 the American car fleet must be nearly 40 percent more fuel efficient than it is today.
Like the demise of newspapers, this is going to be painful to watch.
The president's proposal would require vehicles to get 35.5 miles per gallon by 2016.
Autos will cost more at the dealer, and less at the pump.
The increase, the first in more than 25 years, comes as carmakers struggle with the recession.
The Short Life and Happy Death of Mustang II
Airlines try "continuous descent" to save on fuel costs.
A few models are bucking the trend and selling nicely.