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9Turns out, prices don't really affect gasoline demand

We've been hearing for a while that the steady drop in US fuel prices are hurting sales of fuel-efficient cars like hybrids and plug-ins. As far as driving habits, though? Lower prices are the pump are having little impact on how much people are behind the wheel, according to the US Energy Information Administration (EIA).

34US fuel economy average down for the first time in four years

It's almost impossible not to notice that it's a lot cheaper to fill up at the gas station in the latter portion of this year. As of December 1, the US Energy Information Administration said the average cost of a gallon of gas was $2.778, down almost 50 cents from a year ago. In general, fuel prices have been on the decline for much of 2014, and the effects have started showing themselves with people seemingly more willing to buy lower efficiency vehicles.

23Mercedes named top cheater on Europe's fuel economy test

Transport And Environment Says WLTP Can't Come Soon Enough

It's expected that Mercedes, like any automaker, aspires to be number one. But we've found a case where being at the top of the list is unlikely to be something of which Daimler is going to boast. That's because we're talking about the automaker most likely to cheat the European fuel economy tests.

28Hyundai, Kia want to improve fuel economy by 25 percent

Hyundai and sister company Kia are giving themselves a little bit of time to make up a lot of ground in the fight for better fuel economy. We wonder if a recent multi-million fine might have something to do with this public target.

12Elio 84-mpg trike will talk to your Apple Watch thanks to $2,000 Infinite Skyz option

SkyzMatic Telematics System Will Offer Remote Tracking, More

Elio Motorz is getting zerious with Infinite Skyz. The highly efficient three-wheeled vehicle isn't due until late 2015 (and that may change based on the result of Elio's DOE Advanced Technology Vehicles Manufacturing loan request) but we now know that the 84-mpg trike can be connected to the cloud with Infinite Skyz's SkyzMatic vehicle connectivity system option.

AddHyundai And Kia Penalized $350 Million For Overstated MPG Claims

"Cheating Is Not Profitable," Attorney General says

Nearly two years after Hyundai and Kia announced they exaggerated fuel economy numbers for several of their most popular models, the two Korean automakers have paid a heavy penalty for the transgressions.

170Hyundai And Kia To Pay US $100M For Overstating MPG

Largest penalty for violation of Clean Air Act in U.S. history

Korean automakers Hyundai and Kia will pay the U.S. government a $100 million penalty to end a two-year investigation into overstated gas mileage claims on about one-third of their models.

53Ford decides C-Max shoppers not interested in fuel economy

If you say a car – the Ford C-Max Hybrid, for example – is "fun to drive," can anyone really come up with some empirical evidence against your claim? What about calling it "versatile"? We wonder if Ford has been thinking along these lines when it talks about the green little hatch.

37EPA: Four 2014 Mini Cooper models need to drop mpg numbers

After the huge problems that Hyundai/Kia experienced with its mislabeled fuel economy labels, you'd think that any time an automaker has to adjust its mpg numbers, heralds would be shouting from the rooftops. But, after Ford admitted to three big mistakes with its numbers for the 2013 C-Max Hybrid and Mercedes-Benz had to lower the fuel economy rating for the C-Class, we understand if those heralds are a bit tired by now.

6Hellcat no help to Fiat-Chrysler's bottom-of-the-pile mpg average

What, you expected the "fastest muscle car ever" to help fleetwide fuel economy? Nope, don't think that's going to happen. That means Fiat Chrysler will likely to continue to languish at the bottom of the heap when it comes to fleetwide fuel economy among the largest automakers serving the US, especially as the automaker starts to sell its Dodge Challenger SRT Hellcat. A few hundred Fiat 500E electric vehicles aren't going to turn the trend around.

7EPA study proves plug-in vehicles making their mark

Talk about a report both green-car advocates and gearheads can celebrate. The US Environmental Protection Agency (EPA) put out its annual Light-Duty Automotive Technology, Carbon Dioxide Emissions, and Fuel Economy Trends report. And the 148-page study has something for everyone.

48EPA Says New Vehicle Mileage Hits Record 24.1 MPG

Fuel economy is up almost 5 mpg since 2004

Gas mileage for new cars and trucks in the U.S. averaged a record 24.1 miles per gallon last year, but gains in fuel economy are slowing.

56EPA says 24.1-mpg new car average is best-ever

2013 Model Year Was Half-Gallon MPG More Efficient Than 2012

Well done, America. Through some combination of market forces and government regulations and advancing technology, you've managed to buy enough fuel efficient vehicles to raise the overall average for the 2013 model year to 24.1 miles per gallon – that's 0.5 mpg higher than model year 2012. It's also an all time record high.

17Mercedes forced to lower MPG ratings on two C300 models *UPDATE

New EPA Labels Are Up To 1 MPG Worse Than Before

*UPDATE: Donna Boland, manager of corporate communications at Mercedes Benz USA, told AutoblogGreen that the sticker change only applied to around 500 C-Class vehicles on dealer lots, since a new C-Class came out in late August. "About 500 are left in the United States, and we've relabeled them," she said.

41Elio getting closer to building actual 84-mpg cars

Elio Motors is taking its green-is-good mentality to its factory equipment. The company, which is planning to make super-light three-wheeled vehicles that get 84 miles per gallon, will finally start making trikes next year. The plan is to sell off extra equipment from an old General Motors factory to do so.

77Consumer Reports says Ram 1500 tops fuel economy fight [w/video]

Toyota Highlander Hybrid Knocks Out Midsize SUV Competition

Consumer Reports takes its independent vehicle testing procedures seriously. In an era when we have to question the EPA's official ratings thanks to recent re-evaluations from Ford and Hyundai, an independent voice is important. So, when CR says something is the best, it's worth paying attention to.

17Audi says new 48 volt micro-hybrid system improves fuel economy, paves way for electrification

Most cars use a 12-volt system to power their electrical components. But, with more and more electric bits and bobs being added to new vehicles, a dozen volts is looking a bit weak these days. In fact, Audi says that standard 12-volt systems are being stretched "to their very limits." Enter 48 volts.

72Ram exec: first 30-mpg pickup truck will 'win'

Company's Best Today Gets 28

It is totally possible, today, to take the Ram 1500 EcoDiesel pickup truck, load it up with gear and people, and drive it from Texas to Michigan while getting 38 miles per gallon. We know because we did it. Officially, though, the 1500 gets just 20 mpg combined. A more impressive number is the 28 mpg on the highway.

4Recharge Wrap-up: Google Street View maps gas leaks, Rolls-Royce helps kids build electric racer

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,

63EPA wants actual road-test results to fix auto fuel economy estimates [w/poll]

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

58Toyota Prius sets a different kind of Nürburgring lap record [w/video]

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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