The 2017 Toyota Prius Prime turned out to be a better plug-in hybrid than we had expected when we drove it around sunny Ojai, California, on the press launch in October. It's a viable competitor to the second-generation Chevrolet Volt plug-in hybrid, though the Volt has an EPA-rated 53 miles of electric range to the Prime's 25 miles. Now we've had... 2017 Toyota Prius Prime: gas mileage, electric range review
The 2017 Toyota Prius Prime turned out to be a better plug-in hybrid than we had expected when we drove it around sunny Ojai, California, on the press launch in October. It's a viable competitor to the second-generation Chevrolet Volt plug-in hybrid, though the Volt has an EPA-rated 53 miles of electric range to the Prime's 25 miles. Now we've had... 
Plug-in electric cars are slowly becoming more common, but internal-combustion engines will remain a significant presence on the world's roads for decades to come yet. That means automakers will continue trying to squeeze ever-greater efficiency out of these engines, making them more complex in the process. This will almost certainly include a... 
Car buyers remain aware that the real-world fuel economy of new vehicles may not match the ratings on their window stickers. The year-old Volkswagen diesel scandal has also shown the vulnerability of laboratory emissions tests to deliberate cheating by manufacturers. But the news isn't entirely bad. DON'T MISS: EPA reports show automakers meeting... 
Are you driving a car or a truck? The answer may be harder to determine than you think. U.S. safety and emissions regulations generally split cars and trucks into two categories, but the line between those two vehicle types has become blurred in recent years. That's thanks to the car-based crossover utility vehicle, which now represents one of the... 
The Volkswagen diesel scandal convinced European regulators to switch from laboratory emissions testing to tests that involve actual, on-road driving. This could prevent automakers from deploying "defeat device" software like the kind used by VW on laboratory tests, as well as produce results that more closely align with what consumers can expect... 
The Ford Mustang isn't usually the first vehicle that comes to mind when thinking about fuel-efficient cars. But a new Mustang recently won the title of most-improved fuel economy in a U.K. gas-mileage marathon. It wasn't a Mustang EcoBoost, the 2.3-liter turbocharged 4-cylinder model introduced to provide at least somewhat more-efficient... 
Low gas prices and high sales of crossovers and SUVs have led critics of current U.S. emissions standards to question whether automakers can continue meeting those standards. But a new report from the Environmental Protection Agency (EPA) shows that so far, carmakers are doing just fine. The EPA's annual CO2 and Fuel Economy Trends Report compares... 
While it plans to launch 10 new electric cars by 2025, Mercedes-Benz is far from done trying to improve the efficiency of internal-combustion engines. The German luxury automaker is giving its lineup of engines a major overhaul, in fact. It plans to introduce a new family of 4-, 6-, and 8-cylinder engines, with the new engines starting to arrive... 
Stricter global emissions standards have led many automakers to downsize engines, but that trend may be about to reverse itself. Cutting displacement is a relatively straightforward way to improve fuel economy. But as regulators move toward adoption of more realistic testing procedures in the wake of the Volkswagen diesel scandal, automakers may... 
The 2017 Ford F-150 full-size pickup truck get sa slight fuel-economy bump this year, via the addition of a new 10-speed automatic transmission and an updated 3.5-liter twin-turbocharged EcoBoost V-6 engine. Equipped with this powertrain, the 2017 F-150 is rated at 21 mpg combined (18 city, 25 highway) with rear-wheel drive, and 20 mpg combined...