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Groups call for MPG clarity in advertising

Google Street View is looking for gas leaks. Natural gas leaks are not only extremely dangerous, they're a terrible waste of resources and, as a greenhouse gas, a threat to the environment. Unfortunately, with the decaying infrastructure in many of America's older cities, they're pretty common, too. That's why Google is teaming up with the Environmental Defense Fund to map gas leaks. With sensors attached to the Street View cars, they are sniffing out methane leaks and documenting them. So far,

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The agency thinks the new approach will result in more realistic ratings, especially for hybrids.

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Scroll down the leaderboards of Nürburgring lap times and you'll see mostly racing cars, supercars and sports cars. Delve deep enough and you'll eventually get to hatchbacks and sedans, albeit the most performance-focused of their kind. But a hybrid? Sure, the Porsche 918 Spyder posted the top time for a street-legal series production car, and it's technically a hybrid, but we're talking about another kind of hybrid here. We're talking about a Toyota Prius.

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And Just Look At What You Can Get With Your BMW i8

Apparently, Chevrolet Volt battery covers make suitable homes for bats. As part of an Eagle Scout project, Matthew Netherland created 30 bat houses out of scrapped Volt battery covers donated by Chevy. 22 of the bat houses will be set up near hydroelectric dams in Michigan. Each bat house will accommodate 100 bats, and divert the scrapped materials from the landfill. The battery covers also make great nesting boxes for wood ducks, which General Motors has previously set up at its Milford, Michig

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Latest Error Was Discovered In March

It's been a rough time for the official fuel economy figures for the Ford C-Max Hybrid. When the car was released in 2012, Ford made a huge deal about how it would beat the Toyota Prius V, which was rated at 42 combined miles per gallon, 44 city and 40 highway. The Ford? 47 mpg across the board.

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This is the second time the C-Max hybrid drops its fuel economy numbers

Ford has announced that it will be lowering the fuel economy ratings on a number of its 2013 and 2014 model year vehicles after an error was discovered in the company's internal testing data. The EPA has been notified.

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Let math improve your MPG

The next time the hypermiler in front of you stops you from catching that next green light, take heart. One day, it won't be the driver's fault. There will be algorithms involved. But you migh still be aggravated for not making that light.

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April Fools! That dip in new-car fuel economy during the fourth month of this year was in fact an aberration. The University of Michigan Transportation Research Institute (UMTRI) calculated the weighted average of new-car fuel economy and determined that new car month-over-month fuel economy in May rose for the fourth time in five months. Better yet, May represented a monthly record high.

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But Chevy Discontinuing More Efficient Mild-Hybrid eAssist Model

Chevrolet has announced that it will include stop-start technology as standard in the entry level 2015 Impala. The result is a nearly five-percent improvement in city fuel economy, also known as one mile per gallon, up to 25 mpg, combined.

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Keeping up its from-all-angles approach to efficiency, Toyota has found yet another way to eke out up to ten percent more precious MPGs in its hybrid vehicles, this time electronically. The automaker has announced the development of new silicon carbide (SiC) power semiconductors for use in power control units, which it will begin testing on Japanese roads within the next year.

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With US gas prices approaching levels likely to give Americans the summertime blues, both automakers and prospective consumers appear to be trying to minimize the damage by driving fleetwide fuel economy up to unprecedented levels. This year will be the first model year ever in which more than half of the new US vehicles sold will get more than 23 miles per gallon, the Consumer Federation of America (CFA) says. And if that number doesn't seem particularly unimpressive, consider that fewer than o

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Remember, the target is 54.5 miles per gallon by 2025. Today, the CAFE level is a little over 30. How we get from here to there is something the US Environmental Protection Agency (EPA) is monitoring closely. Thus, the EPA just released an annual flash report on how the auto industry is progressing towards meeting the nation's fuel economy goals.

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If you think the fact that Elio Motors has taken 15,000 reservations for its high-MPG three-wheeler is something to scoff at, well, consider the fact that Honda sold less than 21,000 of its hybrids, plug-in hybrids and electric vehicles combined last year. But, if you think that the company's claim that the trike is cleaner than a year's worth of farts from a cow? Well, go ahead and scoff.

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We've often heard that hitting higher fuel economy targets (like, say, the 54.5 miles per gallon CAFE requirement for 2025 in the US) will need not a silver bullet but something more like silver buckshot. In other words, the industry is going to try lots of different ways to make cars burn less fuel as they drive down the road.

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While Chrysler hasn't officially announced fuel economy figures for its new 200 sedan, the information for one model has just leaked out thanks to the US Department of Energy's FuelEconomy.gov website. It certified the 200 with the 295-horsepower and 262-pound-feet 3.6-liter Pentastar V6, nine-speed automatic and all-wheel drive as getting 18-miles-per-gallon city, 29-mpg highway and 22-mpg combined.

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The AAA sent out a new press release today warning about the effects of extreme temperatures on electric vehicle range. The numbers are kind of astounding: "nearly 60 percent lower in extreme cold and 33 percent lower in extreme heat." Wow, right? Well, sort of.

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Stop us if you've heard this one before: Hyundai is going to have to reduce the officially announced miles-per-gallon number for its 2014 Sonata. While there's a lot of similarity between this new situation and events that transpired in 2012, there are some important differences. For one, the new mileage mistake, which Hyundai says was once again caused by an error at its test centers, is only applicable to cars in the Korean Domestic Market. Secondly, it's not so much mpg as kilometers per lite

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There's a lesson to be learned from the Mitsubishi Motors' Extreme MPG Hypermiling Challenge: if you want to get your 2014 Mirage to get over 74 miles per gallon, apply duct tape.

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Mazda's US sales are down a little bit but the company's fuel economy is almost assuredly up. That's because its fuel-saving Skyactiv drivetrain technology is essentially taking over US vehicles sales. To the tune of about five out of every six vehicles sold, at least.

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As promised in the State of the Union address, President Obama has delivered more details on the higher fuel economy standards his administration is working on for big trucks. The proposed plan, which Obama called "ambitious" in his speech today, will be applied to medium and heavy-duty vehicles and comes with three main parts:

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Go figure. That's what we're saying after fleetwide fuel economy of new cars purchased in January rose during a month when green-car sales fell yet again.

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