Fuel Efficiency

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

GM owners could be less likely to buy another product from the automaker because of its position to squash California's emissions rights.

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.

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

The Model S Long Range Plus nudges even closer to the 400 miles CEO Elon Musk has suggested is in the near future.

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.

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.

CEO Elon Musk boasted that the aerodynamics of the Tesla Cybertruck electric pickup could be "insane for a truck."

Despite the outcome of federal rules for emissions and fuel economy, California could accomplish serious gains on a regional basis.

The state is finished buying fleet vehicles from companies that sided with the Trump administration—and could be done with internal combustion.

With a technology that Hyundai is testing, trucks may be able to take advantage of fuel-saving platooning even on roads with other traffic.

The Union of Concerned Scientists homes in on Ford's smallest model for the U.S. market and its sub-30-mpg ratings.

The Model 3 might top the charts as the top-rated vehicle for energy efficiency in the U.S. market for the 2020 model year.

U.S. EPA ratings have confirmed that the Ioniq Electric is rated at 170 miles with its larger 38-kwh battery pack, arriving in 2020.

The annual efficiency report from the IEA reveals a number of factors that have slowed worldwide energy efficiency improvement.

Four automakers and a trade group are joining the push toward “one national standard”—and stripping California of its authority to regulate tailpipe emissions.