Fuel Efficiency

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 Biden EPA chief plans to restore stricter auto-emissions standards—and perhaps lay out targets for going all-electric.

Such a thermal efficiency, only claimed previously by racing engines, isn't yet offered in any production model.

Virginia is the next state to adopt stricter standards on the way to a potential EV mandate.

Even Big Oil now admits we're past the once-hypothetical point, and is pivoting for relevance in a new energy economy.

As automakers voiced support for a higher mpg standard, they suggested targets lower than those set during the Obama administration.

Five of the top 10 non-gasoline models with the steepest sales gains in 2019 and 2020 were diesels, according to an industry group.

Although EV sales increased 50%, a massive shift to less-efficient SUVs offset any carbon reduction.

In the last days of the Trump administration, officials again yielded to lobbyists in offering a break on federal fines for gas guzzling fleets.

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

GM readies to align itself with the Biden administration on emissions and gas mileage rules—and to cooperate with California rather than try to quash it.

By harnessing the wind, a new car-carrier design will have a smaller carbon footprint than combustion or battery-electric ships.

Americans anticipate they'll drive more after the pandemic than they did before it—adding urgency to the need for more EVs and clean vehicles.

The Environmental Protection Agency might be led by one by a champion of electric cars, potentially replacing a former coal lobbyist.

GM, Toyota, and FCA were served petitions this week from environmental and consumer groups aiming to stop their fight against tighter California emissions rules.

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.