Fuel Efficiency

If you follow our coverage on fuel efficiency, you know that real-world mileage numbers don't always measure up to the official EPA ratings. But if you think failing to meet those EPA numbers by five or ten percent is already a letdown, be very careful about your cargo-carrying expectations in your...

Time was that the most gears you could get in an automatic transmission was three or four. Then came five- and six-speed automatics, which are now pretty much the standard (along with increasingly prevalent continuously variable transmissions, or CVTs). But the transmission wars have continued to...

The Mitsubishi Mirage is selling better than certain hybrid models.

All cars are getting more fuel-efficient under the rising requirements for corporate average fuel economy (CAFE) from now through 2025. Still, if you thought about the category of cars with good gas mileage, the Chevrolet Camaro muscle car likely wouldn't be high on your list. DON'T MISS: How Do...

Famed car designer Gordon Murray will team up with former Honda engine specialist Osamu Goto and oil company Shell to develop a concept for "an ultra-compact, efficient car for city use based around the internal combustion engine." It's not intended for production. Instead, the project's ambitions...

The EPA initially asked for higher truck fuel-economy than it actually wanted, a new book claims.

Could mild-hybrid systems help improve fuel economy while satisfying owners' demand for low costs?

The 2016 Smart ForTwo minicar will arrive at U.S. dealers this fall. When it does, it will be playing the redemption card every chance it gets. Smart was created to counter the increasing global trend toward urbanization. One way to make cities more manageable is a microcar that fit the needs of...

Two new studies claim Americans are driving more, but using less gasoline.

Daimler exceeded the goal set by the Department of Energy's SuperTruck program.

Thus far, automakers appear to have had little trouble meeting the corporate average fuel economy rules that started for 2012 vehicle and will rise steadily through 2025. The general consensus so far is that carmakers have been able to raise their EPA ratings with a combination of tactics that...

Green cars were bumped out of the top 10 new-vehicle segments in 2014, new research claims.

The 5-millionth EcoBoost-equipped vehicle to roll off assembly lines marks a significant milestone for Ford.

As corporate average fuel economy standards continue to tighten each year, car companies have so far kept pace with the rising gas-mileage rules. But automakers are seeking credit for every possible advancement in new vehicles as they look toward an average goal of 54.5 mpg in 2025 (roughly...

Goodyear unveiled two concept tires at the 2015 Geneva Motor Show.

Younger buyers emphasize fuel efficiency, a new study says.

With the highest rated fuel economy of any full-size pickup truck, the Ram 1500 EcoDiesel has been a smash hit for Fiat Chrysler's truck brand. But now the company has acknowledged that some of the trucks--those with rear-wheel drive rather than four-wheel drive--have an issue with diesel exhaust...

Continental believes technology that predicts traffic conditions could soon become standard on new cars.

Mazda still doesn't think the Skyactiv-D diesel engine's performance is up to snuff.

The EPA hopes to tighten standards for fuel-economy testing.