President Biden and the EPA dropped new regulations to lower the allowable emissions of automakers.

The current EPA regulations proposal infers that 67% of new passenger vehicle sales would need to be all-electric by 2030.

The EPA is set to mandate much stricter mileage figures, causing distress from groups concerned the ruling will lead to vastly fewer ICE-powered vehicles soon.

You may be surprised to see a subcompact coupe with an engine three times bigger than the average.

The problems that cause your car to fail its emissions test are repairable--some are DIY-able even--but they must be addressed if you want to keep your car street-legal.

Before rocket scientist Walter Kaaden stepped in to help, two-stroke motorcycle engines had hit a horsepower wall because of their designs. But while Kaaden couldn't completely clean them up, his exhaust designs did bump up two-stroke power significantly.

Much research relating to gas-powered and electric vehicles comes from the The Environmental Protection Agency. This agency is tasked with protecting the environment.

The EPA outlined its new goal of a real-world average 37 mpg by 2026, undoing Trump's reversal of Obama's emissions standards ruling.

The RPM Act (Recognizing the Protection of Motorsports Act) was introduced to the House. The RPM Act seeks to make race cars exempt from the Clean Air Act.

New cars have fuel economy ratings on their vehicle stickers, and you can look up their EPA estimates elsewhere. But what about motorcycles?

Every new car has a vehicle Monroney sticker. If you’ve ever heard someone talking about cars and they say something like “check the Monroney,” you may wonder what the heck that means. You’ll see them grace many a window if you are buying a new car and shopping models. What is a Monroney decal and …

Fuel-efficiency, or rather, energy-efficiency claims are important consumer concerns, especially for those buying EVs. And compared to some of its rivals—especially Tesla’s models—the Porsche Taycan didn’t fare as well in EPA testing. However, for the 2021 model year, it appears the Taycan has found some extra range. But has it? The EPA has new estimates …

Depending on which state you live in, you may have been subjected to the state vehicle inspection process. States like California and New York measure the emissions output from your exhaust, much to the chagrin of those of us who like to modify our cars and truck for performance. While keeping our environment clear by …

There are a number of fuel-efficient vehicles available in Honda dealerships, including some SUVs (well, crossovers). But just because a vehicle has a good EPA fuel economy rating, that doesn’t mean it can easily achieve it in the real world. Such is the case with the Honda HR-V. The Honda HR-V is an inconsistently-efficient SUV …

Even though they’re crossovers, not body-on-frame SUVs, Honda’s ‘SUV’ lineup includes some fairly fuel-efficient models. At least, that’s what their EPA ratings claim. But vehicles don’t always meet those claims in the real world. However, sometimes they can match or even exceed them. And some of those vehicles are Honda SUVs. Why is it hard …

Airbags aren’t the only things bolstering car safety nowadays. Backup cameras have been mandatory for several years now. And advanced driver-assistance features like blind-spot monitoring and adaptive cruise controls are rapidly becoming common-place. However, as safe as modern passenger cars are, IIHS studies suggest trucks and SUVs continue to demonstrate some worrying safety issues. And …

Whether you prefer the six-cylinder or the four-cylinder Supra, Toyota’s sports car is a worthy performance contender. However, the 2021 model’s power bump comes with an efficiency penalty. Until now, the 2021 Toyota Supra 2.0’s official EPA fuel economy figures were unknown. But they’ve finally been released, and they’re not quite as good as you …

In addition to some of its recent quality teething issues, the Porsche Taycan has also been criticized for its somewhat-limited range. The EPA rated the Turbo model’s range at 201 miles, which, to be fair, should be enough for most owners. It’s tough, though, when the Tesla Model Y and Model 3 are rated at …

The increased number of heavy-duty trucks on the road today has caused headaches. Not just from the traffic, but because of the emissions. Heavy-duty trucks don’t have to report to the EPA, a loophole Tesla may be taking advantage of with its Cybertruck. This loophole, along with the problematic pastime of rolling coal, can lead …

For decades, California has led the country in setting tough automotive emissions standards. Now, the New York Times reports that the Trump administration is poised to revoke the state’s right to set its own fuel economy standards. Overturning California’s fuel economy waver is supposedly justified by the administration because it feels no entity should impose …