During the course of our testing, the Bully Dog WatchDog proved to be alternately simple enough for a novice to use and complex enough for our car geek tastes. It'll help you boost your fuel economy within reasonable limits, but don't expect it to be an mpg magic bullet.
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The 2015 Toyota Camry Hybrid features a whole new look, and carries over its excellent gasoline-electric drivetrain.
Citroen modifies its C4 Cactus model with a new, hybrid drivetrain and aerodynamic features to achieve 2-liters of fuel usage per 100 kilometers.
A diesel engine option adds decent fuel economy to the Jeep Grand Cherokee's impressive roster of capabilities.
New software reportedly will be added to as many as 11 million of Volkwagen's diesel cars to bring them in to compliance with emissions laws. The fix could cost $6.5 billion.
US Environmental Protection Agency will use random spot checks to expose technologies that may allow cars to skirt emissions standards.
The new, hotter Mustang uses a technology few mortals cars contain.
The heart of BMW's model lineup, the 3 Series, has a trick new 330e plug-in hybrid variant that promises vastly improved fuel economy and spirited performance.
We received a ton of e-mail about our "Top 5 fuel economy myths" segment and many of those messages we got from you were pointing out even MORE fuel economy myths. Here is a Top 5 that you came up with!
Good fuel economy, all-wheel drive and adaptive cruise control make the Forester an excellent candidate for road trips and a solid all-around car.