FUEL ECONOMY

Fuel economy is about maximizing the number of miles your vehicle can travel on a gallon of fuel. The cost of fuel has a major impact on fuel economy. Check out these great fuel economy articles from HowStuffWorks.
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Will nitrogen-inflated tires save fuel?

If air is already 78 percent nitrogen, is there really any benefit to paying extra for nitrogen tire inflation? And how can nitrogen-inflated tires save fuel, anyway?

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  • How Aerodynamics Work

    How Aerodynamics Work

    Most people never think about driving through a wall; however, drivers do it each and every day -- except the "wall" is actually a wall of air and your car's aerodynamics help you break through it. See more »

  • How Alternative Fuel Pricing Works

    How Alternative Fuel Pricing Works

    As gas prices rise and dire warnings about global warming take over the news, consumers are considering alternatives to gasoline. How much could fuels from corn and vegetable oil run you? And who's setting the price? See more »

  • How Car Sharing Works

    How Car Sharing Works

    Gone are the days when you battled your brother over your mom's car keys. Now, car sharing is civilized, organized and affordable. See more »

  • How EPA Fuel-Economy Testing Works

    How EPA Fuel-Economy Testing Works

    Why do the EPA fuel economy numbers almost always seem to be off base? It has a lot to do with the way the EPA evaluates new cars and trucks for their energy consumption. See more »

  • How MPGe Works

    How MPGe Works

    If you're trying to choose between an all-electric or hybrid car and a conventional, internal combustion-powered ride, how can you tell which one is the most efficient? MPGe is the answer. See more »

  • How much extra gasoline would Americans use if daytime running lights were mandatory?

    How much extra gasoline would Americans use if daytime running lights were mandatory?

    As gas prices spike daily, we're all looking to save money at the pumps. But if your car uses daytime running lights, be prepared to dig deep into your wallet. See more »

  • How Smart Morphable Surfaces Work

    How Smart Morphable Surfaces Work

    When is a car like a golf ball? Simple: when it has dimples! Now why, you might ask, would anyone want a dimpled car? As researchers on smart morphable surfaces are discovering, a dimpled surface can actually help an object travel faster and farther. See more »

  • How the 2008 EPA Fuel Economy Ratings Work

    How the 2008 EPA Fuel Economy Ratings Work

    Word on the street is gas prices are soaring. But as people begin to scour auto dealers for fuel efficient cars, they might notice efficiency ratings have changed a bit. See more »

  • How the California Air Resources Board (CARB) Works

    How the California Air Resources Board (CARB) Works

    Since its formation in 1967, the California Air Resources Board (CARB) has created a number of mandates that have shaped the car industry in surprising ways. Do you live in a California emissions state? See more »

  • How the Hydrogen Economy Works

    How the Hydrogen Economy Works

    With fossil fuels in limited supply, the ever-increasing consumption of this commodity causes problems ranging from global warming to dependence on outside oil sources. Hydrogen is a possible fix, and the technology to take advantage of it is already out there. Find out the benefits of and hurdles facing a hydrogen economy. See more »

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