Gas Mileage

The Sportage Hybrid has recently been rated at up to 43 mpg—beating the most efficient versions of all its hybrid rivals without a charge port.

Well-timed signals can have a significant impact on emissions—equivalent to the CO2 absorbed by a forest 3.3 times the size of Atlanta, according to Inrix.

The mpg standards are a step steeper than an original proposal. Arriving at an effective 49 mpg, they boost fleet efficiency by 8% to 10% annually for model years 2023-2026.

It's been a long time coming. Enforcement had been delayed after automaker lobbying, triggering a lawsuit from California.

Gas prices are fueling a run on high-mpg models, and to some degree on EVs—and it's exaggerating the supply issues already present this year.

The first version of the Hummer EV "electric supertruck" is too portly for EPA range and efficiency ratings. But GM is releasing them anyway.

Even as the Biden administration prepares for tighter fleet fuel economy standards, automakers' bank of credits could stifle innovation and lower the actual mpg average.

The no-frills, high-mpg, three-wheeled car that's been anticipated for a decade still hasn't arrived, but now the company's decided an electric version comes first.

The NHTSA under President Biden will resume the higher fine schedule for gas-guzzling fleets approved in 2016. Should they be applied retroactively?

Ford, GM, and Stellantis expressed a “shared aspiration” to achieve 40% EVs by 2030, with a framework yet to be worked out in detail.

The 2022 Tucson Hybrid drives better than its gas counterpart and offers great value. But the big question is, how efficient is it? We took it on a pair of drives, one highway focused and one through the city, to find out.

The U.S. EPA is reportedly on the verge of revealing a plan for tougher annual efficiency increases that would eventually exceed Obama-era targets.

So-called "superusers" should be a target for the shift to electric vehicles, argues the EV advocacy group Coltura.

With the NHTSA, it proposes to rescind rules that took away California's authority to set its own emissions framework and to mandate EVs.

The EPA expressed "concerns" about the process used to create the Trump-era rules that relaxed fuel-efficiency targets.

The electric-truck invasion hasn't yet started. Is 25 mpg the leading edge of pickup truck efficiency?

The Mercedes-Benz GLB isn't an EV, but with the B-Class Electric in mind we couldn't help but wonder: "What if?"

At least five automakers have negotiated deals with the California Air Resources Board to adhere to stricter emissions standards.

A rare investigation from the EPA's federal watchdog will be conducted over the administration's hasty rulemaking that contradicted its own earlier findings.

The lowest-priced, most fuel-efficient models from Toyota and Honda—two brands that built their reputation on small cars—have been dropped.