Gas Mileage

The U.S. Environmental Protection Agency is set to look into claims that two Ford hybrids don't meet their official fuel economy ratings in real world driving. We reported back in November that the 2013 Ford C-Max Hybrid and Fusion Hybrid struggled to attain their official ratings, even driven with...

it's always nice when the big boys say, "You're right." We reported three weeks ago that Ford's new 2013 hybrids were not achieving their 47-mpg EPA gas mileage rating in real-world usage. Now Consumer Reports has confirmed that finding, based on its own testing, in videos and a blog post published...

Not all green cars are hybrids, diesels, or plug-ins. And with new fuel economy regulations now set through 2025, all cars are going to get more efficient--gasoline cars first and foremost. The new 2013 Nissan Altima mid-size sedan has the highest EPA rating for combined gas mileage of any gasoline...

The auto industry gets plenty of attention for its environmental impact, but it's clear to see that fuel efficiency has made huge strides even in the last five years. It could be even better, though. Ultimately, a carmaker has to sell cars to survive--and it does that by creating products that...

Mazda is pushing ahead with its plans to offer a clean-diesel four-cylinder engine that could prove to be a strong rival to the TDI four in some Volkswagen and Audi products. While the 2014 Mazda6 will arrive in its lower-priced form with a 184-horsepower, 2.5-liter version of the four-cylinder...

Along with the new, ultra-fuel-efficient 2014 Ford Fiesta with the 1.0-liter EcoBoost three-cylinder engine, Ford's subcompact gets a number of other changes for the 2014 model year. These include a revised interior that adds a 6.5-inch LCD touchscreen display and optional MyFordTouch infotainment...

In mainland Europe, where gas mileage is measured in liters used per 100 kilometers (l/100km), a 'three liter car' doesn't usually refer to engine capacity. Instead, it means 3L/100km, or around 78 MPG. And now Audi wants to make a one-liter car--the equivalent of 235 MPG. Revealed by What Car, the...

Have you noticed how much poorly synchronized lights—or traffic that's trying to go faster than the lights permit—can add to congestion? A new system in the works from Honda aims to provide a simple interface for smoothing traffic flow, while increasing safety and gas mileage. The idea...

How small is too small, when it comes to engines? Those of the "no replacement for displacement" school of thought might be thinking more about performance than they are gas mileage, but at what point does downsizing actually start to harm gas mileage, rather than help it? As carmakers strive to...

This is starting to look not so good. It appears that two new hybrid cars from Ford--the 2013 C-Max Hybrid hatchback and the 2013 Fusion Hybrid sedan--may not deliver real-world gas mileage that's anywhere near their 47-mpg EPA ratings. Automotive journalists have been quietly discussing this for a...

It's been on sale in Europe for months, and now it's coming to the U.S.: the smallest engine sold by a U.S. automaker in decades. The 2014 Ford Fiesta that goes on sale next year will offer the turbocharged 1.0-liter three-cylinder EcoBoost engine as an option in the subcompact hatchback and sedan...

If you shop strictly by the EPA numbers today, the 2013 Honda Fit probably won't be among the top subcompacts you cross-shop. The current Fit's federal ratings, of 28 mpg city, 35 highway with the five-speed automatic, or just 27/33 mpg with the five-speed manual, aren't exactly at the top of the...

Unless you're the type to very closely read the fine print on the face of fuel pumps, you might not know that the vast majority of U.S. gasoline is truly ten-percent home grown—that's ten-percent ethanol, and with that ethanol almost certainly from corn. The upsides of adding more ethanol to...

Now the recriminations--and lawsuits--will start. And we expect the focus on real-world gas mileage to increase, following news that Hyundai and Kia will revise gas-mileage figures downward on 13 different models from the 2011, 2012, and 2013 model years--and reimburse buyers for the extra money...

Korean automakers Hyundai and Kia are being sued in U.S. courts over inflating gas mileage ratings on 2011-2013 vehicles. It was revealed on Friday that both automakers had reported higher numbers on EPA window stickers than the cars were actually capable of in EPA economy testing. Both companies...

If you're in the market for a new Honda Civic, Toyota Corolla or Volkswagen Jetta, you're also in the market for the 2013 Nissan Sentra. While we haven't driven the 2013 Sentra on GreenCarReports yet, our sister site at TheCarConnection has reviewed the car in full--useful for any potential buyer...

Despite best intentions, it's always necessary to take EPA fuel efficiency figures with a pinch of salt. A look at MPG-recording sites like Fuelly or the EPA's own fueleconomy.gov website will show that many drivers have wildly varying economy figures. And that, of course, is why the slogan "Your...

Toyota has a reputation among U.S. car buyers for being green and offering fuel-efficient vehicles. But a recent post on the Natural Resources Defense Council blog painted a different picture. Noting that Toyota was suing to stop the implementation of fuel-economy rules in Mexico that duplicate...

If you live in a large city, work in a 9-5 job, and drive to the office, it’s probable that you end up spending at least some of your daily commute stuck in traffic. Assuming you drive a regular gasoline car--one without stop-start technology or hybrid drivetrain--congested traffic can...

Gas mileage in hybrid vehicles can be a tricky thing. Depending on how they're designed--and at what speeds their electric motors kick in--their efficiency can vary considerably. When we tested the 2013 Ford C-Max Hybrid six weeks ago in Los Angeles, the real-world indicated gas mileage was 37 mpg...