Fuel Economy

Start-stop systems have finally started to arrive on U.S. new cars in noticeable numbers. The systems, which simply turn off a car's engine when it's sitting stationary and then switch it back on as the driver's foot starts to lift off the brake, are now fitted to 7 percent of new cars sold in the...

A new study ranks states based on energy efficiency.

The 2015 Honda CR-Z enters the new model year unchanged.

Prototype Volvo engine produces impressive power with help from three turbochargers, one of which is electric.

Subaru sales have surged over the last decade, taking the quirky Japanese brand from its Snow Belt niche into more and broader markets. This year, the redesigned 2015 Subaru Legacy is a viable contender to go head to head with the most mainstream mid-size sedans: Toyota Camry, Honda Accord, Ford...

The 2015 Honda Fit subcompact is an entirely new model, and for North America, it's built in a new plant in Mexico. That means that its launch was necessarily slow and cautious--in fact, it was delayed two months--and then a bumper upgrade to reinforce crash-safety welds hardly sped up the...

The 2015 Chevrolet Trax goes on sale in January.

A new study looks at the views of hybrid owners, and everyone else, on hybrid cars.

Ram is increasing EcoDiesel truck production to meet demand.

The 2015 CR-V boasts improved gas mileage thanks to a new CVT.

Start-stop systems, which switch off a car's engine while it's stopped to boost fuel efficiency, are now entering the U.S. market in serious numbers. Many European makers, including BMW, Mercedes-Benz, and MINI, are fitting them as standard on 2015 models, and there are more to come: By 2022, some...

More-efficient gasoline cars may be curtailing sales of hybrids, plug-ins, and other alternatives.

At its most fuel efficient, the 2015 Ford Mustang is rated at 26 mpg combined.

It's embarrassing when an automaker has to reduce its EPA gas-mileage ratings after being investigated by the agency, as Ford did in August 2013 for its 2013 and 2014 C-Max Hybrid. It's even more embarrassing when the company has to cut the rating on those vehicles again--along with five...

The Mazda MX-5, formerly Miata, holds a Guinness World Record as the highest-selling two-seater sports car in history. More than 940,000 MX-5s have been made since 1989, and the new 2016 MX-5 has just made its debut. Despite those impressive sales numbers though, the MX-5 is actually the perfect...

General Motors released the first fuel-economy information for its new mid-size pickup trucks.

One of the factors making higher gas mileage possible across pretty much any vehicle on sale these days is multispeed transmissions. At the dawn of this century, four-speed automatics were the standard; now it's six speeds--and eight-speed automatics are coming on strong. Future models of the...

Leaked window stickers reveal 2015 Ford Mustang EcoBoost fuel economy.

Automotive sites with readers whose tastes tend toward sports and performance cars have been having a field day with the upcoming 2015 Dodge Challenger SRT Hellcat. This 707-horsepower muscle car (along with the Charger Hellcat four-door sedan announced just this morning) is the most powerful...

Aluminum construction and Ingenium engines will boost the 2016 Jaguar XE's efficiency.