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These are the 'Greenest' and 'Meanest' cars in 2015

As has become tradition, the American Council for an Energy-Efficient Economy (ACEEE) has come up with a ranking of what it refers to as the "greenest" cars of 2015, and, by way of contrast, a list of the so-called "meanest" cars, so those who value eco-friendliness over all else can choose which vehicles they should or should not consider buying. As you may expect, electric cars make up the majority of the greenest cars on the list, but, perhaps surprisingly to many, the Tesla Model S didn't make the cut. It's worth noting, too, that where the electricity an owner uses to charge their electric vehicle has a big impact on its overall environmental impact. "A car that is charged using electricity generated from natural gas or renewables is going to have significantly less impact on the environment than one charged on a coal-heavy grid," says ACEEE lead vehicle analyst Shruti Vaidyanathan. The ACEEE's list for 2015 looks very different than it did in 2014. It's an interesting collection, though – and we're sure this goes without saying, really – we'd recommend doing a bit more research into each vehicle and how it might fit into your daily life before making any purchase decisions. Click here to see the ACEEE's list of the Greenest and Meanest vehicles sold in the United States in 2015. Green Bugatti Chevrolet Fiat GM GMC Mercedes-Benz Nissan RAM smart Toyota greenest greenest cars

GM executive chief EV engineer says reducing cost of plug-in vehicles is 'huge priority'

As we know, another major automaker investing heavily in electrified vehicles is General Motors, and it's doing things much differently than rivals BMW, Ford or Nissan. The Chevrolet Volt extended-range EV is a modest seller at its $35,000 sticker price but a huge hit with owners. The Chevy Spark BEV, still in limited availability, puts smiley faces on its owners and drivers. The just-introduced Cadillac ELR, a sharp-looking, fun-driving $76,000 luxocoupe take on the Volt's EREV mechanicals, has admittedly low sales expectations. With this interesting trio in showrooms and much more in the works, the third vehicle electrification leader I collared for an interview at Detroit's North American International Auto Show (see #1 and #2) was Pam Fletcher, GM's executive chief engineer, Electrified Vehicles. ABG: Why do your EREVs need four-cylinder power to extend their range when BMW's i3 makes do with an optional 650 cc two-banger? "We designed [the Volt and the ELR] to go anywhere, any time" - Pam Fletcher PF: I get that question all the time: why not something smaller? You don't really need that much. You use the electric to its ability, then you just need to limp. But we designed those cars to go anywhere, any time, and we don't want their performance to be compromised. If you're driving through the mountains, we don't want you to be crawling up grades, or to be limited on any terrain. So it's optimized to be able to travel literally the biggest grades and mountain roads around the globe at posted speeds. Because what if you can't? Another good reason: when the engine is on, you have to run it wide open throttle, max speed, most of the time. And while we can do a lot with acoustics, and the ELR has active noise cancelation, a small-displacement, low cylinder-count engine at high speed, high load all the time isn't something you want to live with. That's how we came up with the balance we did among the key factors of performance, NVH [noise, vibration and harshness] and range. ABG: Where you go from here? Is the range-extender engine due for an update? PF: We know and love the current Volt, and there is still a lot of acclaim about it, so we think it's a good recipe. But we are heavily in the midst of engineering the next-generation car, which I think everyone will love and be excited about.

Valet mode captures joyride in red Corvette

A man in California is among the first to catch a valet behaving badly in his 2015 Corvette using a controversial built-in recording feature. Dan Cowles told KTLA 5 when he bought his dream car, a 2015 Chevrolet Corvette Stingray, he opted for the Performance Data Recorder. The Corvette PDR uses a high-definition camera mounted in the windshield header, a microphone in the cabin and a GPS receiver that record and track the sports car's movements and sounds. They work together to produce a video with telemetry overlay, so you can see acceleration rates, lap times and g-forces. The system can be customized to show extensive performance data, or simply video of your drive like a traditional dash cam. It also comes with Valet Mode, which locks the glove box, disables entertainment and records video. The audio recording feature ran afoul of several state's recording consent laws, but this video has no audio, indicating the fix may have been as easy as turning off the microphone. Cowles dropped off his hot red 'Vette with the valets at the Segerstrom Center for the Performing Arts in Costa Mesa, CA. When he got his car back he checked the PDR and discovered footage of the valet taking a short, but intense, joyride in the garage. In the video, the valet finds a straightaway in a tiered parking garage and pushes the car to 50 miles per hour in five seconds before quickly stopping. He then parks the car without incident. The valet then gets out of the car and takes one more admiring look at the front. The valet company has yet to commented on the video, according to Fox News, but valets everywhere should be on notice; that little red Corvette you have your eye on may have its eyes on you. Related Gallery Ward's 10 Best Engines of 2015 View 10 Photos Chevrolet Driving Classics valet parking