Fuel Economy

Premium gasoline offers potential fuel-economy benefits, but will consumers pay?

The difference between unadjusted CAFE figures and window-sticker fuel economy.

Gas-mileage ratings for the 2016 Mazda MX-5 Miata are in.

Many of the cars are more like enclosed bicycles, and virtually none of them could operate on public roads or highways. But the Shell Eco-Marathon offers some useful lessons for the more than 100 high-school and college teams that compete in it--many of them having little to do with the cars...

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...

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...

Startup Elio Motors, which needs $230 million to begin production of its radical lightweight, two-seat, three-wheeled fuel-efficient vehicle, is still about $165 million short. CEO Paul Elio, speaking at last week's New York Auto Show, said it has taken more than 41,000 deposits from eager...

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?

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

The idea of an all-electric Nissan BladeGlider sports car now seems to be somewhere between delayed and defunct, but the narrow-front delta-wing shape continues to intrigue and challenge vehicle designers. First unveiled in 2010 as a pure race car, an engine-driven DeltaWing car even competed in...

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...

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...

It happens so quickly: They learn to crawl, and then walk, and before you know it, you're helping them do their first oil change in their first new car. A little more than six months ago, I contributed an article on my car shopping experiences with my daughter Priscilla. Those ended with her...

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.