Fuel Efficiency

Ten years ago this week, in February 2009, Green Car Reports published its first story—one packed with insight regarding the Chevrolet Volt, which was then still nearly two years away. Despite all that could have happened to the Volt in GM’s bankruptcy, it arrived on time and was...

A look under the hood of Mazda’s future includes a patchwork of “what if” possibilities and a series of juggled timelines. Mazda is in a tough spot right now with regulators and in finding its place across many global markets. Part of the issue is that Mazda is considered an...

Considering how much of a commitment Nissan has made to electric vehicles over nearly a decade—mass-producing them on three continents—the lack of any parallel commitment to plug-in hybrid models, or even hybrids, has been baffling. Nissan finally remedied that in 2016, with the...

Former Porsche AG CEO Wendelin Wiedeking, who waged a failed takeover of the Volkswagen Group ten years ago, is reportedly one of the backers of a new venture that, at face value, is making claims that sound very much like those made of what was then the favored tech for VW and Audi: TDI diesel...

Mazda has revealed its 2019 Mazda 3 compact car, in new-generation form, at the 2018 LA Auto Show. It’s not surprising, given the brand’s go-it-alone strategy this decade, that the new ‘3’ appears to take a different path than key global compact-car rivals in nearly every...

As solar cells get more efficient, powerful panels can fit on smaller areas. For those looking to use renewable energy for transportation, that means solar panels can now move from home rooftops used to power car chargers to cars themselves. In Korea on Wednesday, Hyundai and Kia revealed some...

Less than a week after speaking out in favor of a national electric vehicle mandate, and in the shadow of Tesla reporting a profitable quarter, General Motors might be on the verge of announcing a radical change to its plans for future electric vehicles and plug-in hybrids in the U.S. The automaker...

Honda joined General Motors on Friday and called on the EPA to abandon its proposed fuel-economy rollback, asking federal officials to negotiate with states like California to offer a single, comprehensive update to federal fuel-economy standards. Honda filed its comment Friday, the last day for...

It’s been less than five years since Volkswagen produced its limited run of just 250 XL1 plug-in diesel hybrid coupes, of which only 200 were sold to retail buyers. The Volkswagen XL1 has all the makings of an instant collectible, with its combination of low production volume, advanced...

The term “hail Mary” might be appropriate for what General Motors, led by chief executive officer Mary Barra, is attempting at this stage of the federal government’s dialog on fuel efficiency and electric vehicles. GM is launching an effort to propose a 50-state solution for...

Readers who want to make their voices heard in objection to (or support of) the EPA proposal to freeze fuel economy standards have until tomorrow to get their comments in. The EPA proposed in early August to undo Obama-era rules requiring cars to reach increasingly stringent fuel-economy targets...

Drivers are not helpless in the face of government plans to roll back fuel economy standards. A joint August proposal from the EPA and NHTSA to freeze planned increases in fuel economy standards is out for public comments until Oct. 23. Public comments can make a difference. DON'T MISS: Trump...

Just as the Trump administration moves to roll back fuel economy standards, a new survey shows that Americans are dissatisfied with the fuel economy their cars already get. The American Customer Satisfaction Index survey for cars was released Tuesday, and among the 10 attributes the survey studied...

The SEC issues subpoenas to Tesla over CEO Elon Musk's plan to take the company private. Switzerland halts registrations of some diesels from Mercedes-Benz and Porsche. New records show internal pushback at the EPA over freezing fuel-economy regulations. And we run down the best deals on green cars...

GM files patents for three new active aerodynamic aids. A reader's family finds enough charging outlets to make a 2,000-mile road trip in a Chevy Bolt EV. Our readers report they often find electric-car chargers that don't work. And a report draws some surprising conclusions about electric cars'...

Today's environmentally conscious students are thinking more about the environment in the choices they make. They still need to get around, but they may be less likely to accept the price of doing so in a car with a tailpipe spewing pollution and greenhouse gases into the atmosphere. Many may need...

Shale oil's prevalence in the American oil market may present a large obstacle for rising fuel economy standards. Shale oil creates gasoline with a lower octane rating than gasoline created by conventional crude oil. This is due to higher concentrations of elemental components such as Naphtha...

Last week we listed seven of the most bizarre "green" cars (and some not-so-green) of the 20th century, most of which were rolled out in response to depression, war recovery, or out-of-control gas prices. This week, we'll look at seven more from the 21st century, which seems to have had a...

Chevrolet announced last week that its upcoming 2019 Silverado full-size pickup will offer a new turbo-4 in place of the base V-6 in some models. Like the V-8s in some of GM's large pickups, the new engine will have active cylinder management that cuts two of the four cylinders during light loads...

Truck driver Bob Sliwa hit the road on Thursday night in his carbon-fiber-bodied, diesel-powered semi truck, as he attempts to set a fuel economy record for big rigs by the time he pulls into Jacksonville, Fla., next Wednesday. The endeavor, sponsored by Shell and the North American Council for...