Fuel Efficiency

Amid this week's blackouts, California moved to ban diesel trucks in the future while relying on diesel generators to supplement the grid.

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.

Biden would also propose new fuel economy standards that go beyond what was in place during the Obama administration.

The latest report from the EIA anticipates that total world energy investment will drop by 20% in 2020, due to the coronavirus pandemic.

The new Sonata Hybrid costs more than the outgoing version, and more than its rivals.

The EPA might give automakers another big break on fuel economy and emissions—in addition to the one they just received in CAFE requirements.

Real driving emissions ratings should be the start of any incentive program aimed at spurring sales, amid a pandemic with connections to air quality.

Car buyers see mileage as an important piece of vehicle selection—with or without the low gas prices.

The EPA has released a final rule that will ease the fleet fuel economy requirements and allow higher amounts of CO2 from vehicles.

Pickups trucks continue to lag other segments of the market in terms of efficiency improvements. When will they catch up?

With Honda's two-motor hybrid system, the 2021 Insight hits a high in city driving and is shaping up to be the highest mileage sedan without a charge port.

Although Fiat Chrysler sold a higher rate of hybrid vehicles than any other automaker, it came up last in fleet fuel economy. How'd that happen?

Some traditional internal-combustion components, like transmissions, could use a rethink yet—with more smarts, not more gears.

If you can't (or don't want to) plug in, the 2020 Highlander Hybrid is the most fuel-efficient way to carry up to eight people.

The big electric sedan will get a 400-mile highway range, not by packing in more battery cells but by focusing in on efficiency at every step.

EPA ratings released yesterday confirm that the Tesla Model Y has nearly the range of the Model 3—and some unexpected advantages.

Instead of doing away with some of the current incentives for hybrids and PHEVs, it might just limit the annual hike to 1.5% through 2026.

The 2020 Taycan Turbo electric sedan achieves just 201 miles in the official EPA range test, which puts it below the Audi E-Tron electric SUV.