Gas Mileage

Your mileage may vary, as the saying goes. But it turns out that real-world fuel efficiency in European cars varies considerably more from official ratings than in the U.S. And some car brands are so far off from their ratings that a buyer may only get two-thirds of the published fuel efficiency...

The Wards Auto Fuel Economy Index recorded a decrease in new-car average fuel economy in November compared to the same time last year.

a standard backup camera is the only major change to the Scion xB for 2015.

The 2015 Ford Mustang not only includes V-6 and V-8 models, per longstanding tradition, but also a new turbocharged four-cylinder EcoBoost version. Now, the first four-cylinder Mustang in more than 20 years is being recalled to inspect and fix a possible issue with its fuel system. DON'T MISS: 2015...

We compare rated fuel economy of the top-selling full-size pickup trucks.

Perhaps no gas-mileage ratings have been as eagerly awaited this fall as those for the all-new 2015 Ford F-150 pickup. The redesigned full-size truck with an aluminum body and pickup bed was expected to get better gas-mileage numbers than earlier F-150s. And it has, with a top rating of 22 mpg...

Researchers compare emissions-related deaths to car crashes, with ambiguous results.

Porsche is testing a semi-autonomous system designed to maximize both efficiency and performance.

Ford is offering dealers a bonus if they increase sales of certain models.

By most accounts, the world is pretty much awash in oil these days. Increases in North American shale-oil production have boosted supply to the point where there's now discussion of the U.S. becoming a net oil exporter sometime in the next decade. Meanwhile, the vehicle fleet is slowly getting more...

Electric turbochargers could become more common as carmakers work to boost fuel economy.

We compare the gas mileage of two green mid-size sedans.

A U.K. study confirms that hybrid cars are best suited to city driving.

Hyundai announces a new six-speed automatic transmission for hybrids.

After two fuel-economy cuts, Ford can no longer claim superior fuel economy for its C-Max Hybrid.

The 2015 Hyundai Sonata Eco is the most fuel-efficient version of the Korean maker's mid-size sedan, aside from its Sonata Hybrid model. And this year, the Sonata Hybrid uses the carryover body from the last-generation model--meaning that if you want the highest-mileage Sonata with the new and more...

A plastics-industry backed study says fuel economy is the primary factor when buying a car.

The EPA plans to audit more of the gas-mileage test data submitted by carmakers, and tighten its rules for that testing, after fuel-economy ratings on almost 20 recent models proved to be too high and had to be reduced. The move follows the highly publicized rollbacks of gas-mileage ratings over...

China will publicly shame offending carmakers, and limit production.

Led by Volkswagen CEO Martin Winterkorn, carmakers are asking for less-strict European emissions standards.