Fuel Efficiency

Daimler will be hoping that third time is the charm with the new third-generation 2016 Smart Fortwo and its four-seat counterpart. The all-new models have now been revealed in all their glory at the launch event in Berlin, and while several facets of the brand's values remain, a whole lot has...

Several automakers have come under fire in recent years over reported EPA gas mileage figures that prove unattainable in the real world. According to the Wall Street Journal, the EPA plans to require car manufacturers to road-test new cars to confirm gas-mileage ratings based on laboratory tests...

We drive a Nissan Frontier midsize pickup truck equipped with a Cummins four-cylinder turbodiesel engine.

The 2014 Mercedes-Benz B-Class electric car hasn't quite reached dealerships yet--several are telling customers it could be next week--and its EPA ratings for range and efficiency have been something of a mystery too. Now, courtesy of an alert electric-car fan, we know the ratings for the first...

Whether you call them fuel-economy standards or carbon-emission limits, new vehicles sold in North America, Europe, China, and elsewhere are subject to regulations that will require them to get more energy-efficient. Now, another country is discussing new regulations that would require both new and...

If you're in the market for a new compact car and want to improve your gas mileage, what do you buy? You could opt for the latest hybrid or diesel models, or even an electric car like the Nissan Leaf. But if those are a little outside your comfort zone, you could do worse than to look at the latest...

"Nobody knows or can know how much oil exists under the earth's surface or how much it will be possible to produce in the future." That's how BP starts its website page defining oil reserves, and it's why we should take statistics like "53.3 years of oil reserves" with a pinch of salt. But...

European cities aren't always that easy to navigate when you're in a car. They twist and turn through narrow, busy streets constrained by the topography and architecture, designed long before powered vehicles were prevalent. If that's not enough, one European city--the Spanish capital Madrid--is...

When we report on European market cars, we'll often advise you to take their official fuel consumption ratings with a pinch of salt. The current New European Drive Cycle (NEDC) test simply isn't very real-world relevant, unrealistically inflating a car's economy potential. That may change in the...

Producing carbon dioxide is an unavoidable part of burning fuel in cars. The problem with this of course is that carbon dioxide is a greenhouse gas. And the more cars there are on the road, the more sources of this greenhouse gas there are. The concept of carbon dioxide capturing has been theorized...

Start-stop will be standard on certain 2015 Chrysler 200 and Jeep Cherokee models.

Ohio's push for renewable energy loses momentum with new legislation.

There are some pretty efficient cars on sale these days, but it's fair to say that to benefit from the technology, you often have to spend a little more to start with. What if you want to spend as little as possible on fuel, but spend as little as possible on the car itself too? That's where...

The fastest, most expensive sports cars and supercars must constantly boost performance to stay competitive--and now they're also having to cut their carbon emissions at the same time. Ferrari, possibly the best-known among sought-after supercar brands, plans to cut average carbon emissions across...

The Toyota Highlander Hybrid remains the sole seven-seat hybrid vehicle on the market, and it has been redesigned and updated for the 2014 model year. While smaller vehicles--the Prius far ahead of any other model--make up the bulk of U.S. hybrid sales, the 2014 Highlander Hybrid stands at the top...

The German Federal Parliament will take delivery of 66 Audi A6 2.0 TDI Ultra sedans.

Scion, the supposedly hip, youth-oriented brand established 10 years ago by Toyota, hasn't had a new volume model in seven years. Its overall sales fell last year even as the new-car market surged. Now, apparently, it's slated to get two new models--a subcompact hatchback based on the...

The news yesterday was simple: Ford has lowered the gas-mileage and efficiency ratings for six of its 2013 and 2014 models. Three are hybrids from Ford and Lincoln, two are Ford plug-in hybrids, and the last is the 2014 Ford Fiesta, newly updated, which has revised ratings for four different engine...

A study commissioned by the aluminum industry claims the material will be used more in future cars and trucks.

The 2015 MINI Cooper five-door breaks new ground for the brand, as demonstrated by this ad.