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214Figuring out exactly how much it costs to charge Tesla Model S

Home Tests Show Anywhere Between 82 and 90 Percent Efficiency

Is the Tesla Model S an electricity guzzler? One driver trying to answer that question says it does gobble down more juice than previously thought, but it's not time to make Hummer jokes just yet.

11How to get incredibly accurate information on your EV's charging power

One would think that paying about $300 to receive a bit of bad news about electric-vehicle charging would be counterproductive. But the fine folks at Teslarati believe that truth is beauty, and they're willing to pay a little extra for the straight dope.

18Toyota finds 10% MPG improvement in hybrid PCU

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.

AddVW's Krebs talks hydrogen, says 'most efficient way to convert energy to mobility is electricity'

Volkswagen has staked out a claim to be the industry leader in electric vehicles. One of the executives leading the VW Group into an e-mobililty future is Rudolf Krebs, who took over VW's electrification efforts back in 2010. Today, he is the group commissioner for electric drive systems for the VW Group, and he took part in a green energy round table at the LA Auto Show today. We'll have a more complete write-up on that discussion later, but for now we wanted to tease out something Krebs said a

33Toyota donates engineers, not money, to country's largest anti-hunger charity

Key to production of any kind is efficiency - the ability to achieve maximum productivity with minimal effort or waste. Toyota has become a master of efficiency, with streamlined manufacturing operations around the world. In fact, the Japanese brand has become so well known for efficient operations that it now offers consulting services for organizations and companies outside the auto industry.

AddMIT: U.S. could have much better MPG, but our cars got fat

Americans have gained weight over the last thirty years, and not just around the midsection. American garages and driveways have also put on pounds as cars have become larger and more powerful. A new study from MIT says that, if not for the increase in vehicle weight, we could already be exceeding vehicle mileage targets still years away.

AddAuto applications sought for new advanced metal that's 100x lighter than Styrofoam [w/video]

Automakers are being pinched to increase safety and improve fuel efficiency, but those two goals often work against each other. That could change thanks to a material that is 99.99-percent air.

46Auto applications sought for new advanced metal that's 100x lighter than Styrofoam [w/video]

Automakers are being pinched to increase safety and improve fuel efficiency, but those two goals often work against each other. That could change thanks to a material that is 99.99-percent air.

AddDid Volkswagen tamper with its efficiency graph in Germany?

Every once in a while you'll find an accidental lie on the Internet...

9Did Volkswagen tamper with its efficiency graph in Germany?

Every once in a while you'll find an accidental lie on the Internet...

32Which automaker is the most productive?

Volkswagen piled on some big-time profits for the 2010 model year, as the German automaker finished the year in the black with a staggering $10 billion. VW sales were up, too, with 7.1 million units moved for the year. And compared to VW's long-term production plans, 7.1 million is a relative drop in the bucket – the German automaker plans to build 10 million vehicles per year by 2018, making the massive conglomerate the largest automaker in the world by volume.

AddGoogle's investment in Transphorm could give electric cars more range

Compared to gas and diesel vehicles, electric cars are incredibly efficient. It's a good thing too, since their batteries hold only a small fraction of the energy in a typical gas tank. As with most any technology, though, there is always room to boost efficiency. This is where start-up Transphorm comes in, and perhaps in a big way. Why? Because Transphorm just secured $20 million from backers Google Ventures, Kleiner Perkins Caulfield & Byers, Foundation Capital and Lux Capital. The company

AddMercedes-Benz will do the 'unthinkable' to go green

2012 Mercedes-Benz CLS – Click above for high-res image gallery

26Mercedes-Benz will do the 'unthinkable' to go green

2012 Mercedes-Benz CLS – Click above for high-res image gallery

AddParis Preview: Ferrari to introduce more efficient version of California GT

Ferrari California – Click above for high-res image gallery

AddAmerican ignorance of efficiency numbers might be the biggest hurdle to cleaner cars

Math isn't appreciated enough in our society. As a big fan of the "I'm an English Major, You do the math" shirt, I'll admit I'm part of the problem. We can all agree, though, that it's hugely important to "get" basic mathematical concepts, especially when it comes to understanding energy efficiency (like miles per gallon). Trouble is, too many Americans don't have this knowledge.

AddShift towards smaller, more efficient vehicles began in 2007 and there's no turning back now

2010 Mini Cooper 50 Camden Edition – Click above for high-res image gallery

AddReport: Sales of 30+ MPG cars fell 10% in first five months of 2010

Every month, Ward's Auto posts its Fuel Economy Index (FEI) numbers. Last time around, we noted that Ward's witnessed a decrease in buyer interest in fuel-efficient vehicles. While the numbers did indicate that overall fuel efficiency was still on the rise, it was also evident that buyers were opting for larger, less efficient vehicles. The FEI numbers posted for May are even more disturbing.

29Audi travolution project has cars and traffic signals talking

Audi is experimenting with networking cars and traffic systems in order to cut the amount of time drivers spend idling at stoplights. The German automaker claims that its efforts could result in saving 184,920 gallons of fuel per year and slim CO2 emissions by as much as two million tons. The idea is pretty simple – each car is able to communicate with upcoming traffic lights via wireless LAN and UMTS connections. As the vehicle approaches a stoplight that's already red, the light will tel

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