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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

Diesel Power finds the ultimate modified oil-burner

For nine years, Diesel Power magazine has run the Diesel Power Challenge, this year's grindfest being "a week-long torture test that features seven events, nine trucks, 8,000 horsepower, and nearly 15,000 pound-feet of torque." The road to being crowned "the most powerful truck" starts with a dyno run, and then continues through the completion of a CDL-style obstacle course, an eighth-of-a-mile drag race while towing a 10,000-pound trailer, a quarter-mile drag race without a trailer, a fuel economy test in the mountains and finally a sled-pulling test through a 300-foot-long packed-mud pit.
What kind of trucks get into such a fight? Last year's winner, for instance - who upgraded his truck this year to prove he didn't "luck into the win" - drives a 2008 Ford F-250 Super Duty with a 6.4-liter Power Stroke V8 upgraded with a custom intake, Elite Diesel triple turbos and a two-stage nitrous system. Another competitor has a 2005 Dodge Ram 2500 powered by a 5.9-liter Cummins inline-six, upgraded with Garrett turbos, dual-stage nitrous, a seven-inch exhaust stack and twin fans built into the bed to cool the Sun Coast Omega transmission. The numbers on that truck: 1,255 horsepower, and 2,063 pound-feet of torque at the wheels. Naturally, as the image above might suggest, things don't always end well.
You'll find all five videos covering this years challenge below. A scene in the dyno video sums it all up perfectly: a competitor leaves his nitrous on too long and the crew is treated to some ominous poppings, he leans out the window, throws both hands up and shouts, "Amer'ca!"

How two-state Chevy Spark EV outsold 50-state Volt last month

Is it really just about price? Last month, the Chevy Spark EV got a sizable price drop of $1,500 alongside a lowered lease price of $139 a month (down from $199). Those numbers, particularly that cheap lease, had a tremendous impact on how many all-electric Sparks GM sold last month. There were 920 Spark EVs sold in April, and the Spark EV is available in only two states: California and Oregon. Sales will start in Maryland in the third quarter of 2015, but there are no pre-orders taking place there, so all 920 were West Coast sales. To be more precise, there were about 864 Spark EV leases signed last month, since 94 percent of those 920 sales were retail leases. As Annalisa Bluhm from Chevrolet communications told AutoblogGreen, that level was, "simply insane." "In those states which offer Spark EV, you can get a 1LT Spark EV for less than a 1LT Spark, with more features" Bluhm said. "Factor in that you will save approximately $82 per month by abstaining from gas, and it's easy to see why people went crazy for the Spark." Let's put 920 into perspective. For one thing, it's crazy up from the 151 Spark EVs sold in March 2015 and the 97 sold in April 2014. It's also almost as many as GM sold all last year, and way more than two years ago. The General sold 653 Spark EVs in 2013 and 1,146 in 2014. To throw in a comparison with GM's longstanding plug-in champion, the aging Volt, the Spark EV came out ahead in the monthly tally for the first time ever. In April, the Volt sold 905 units. The plug-in hybrid's best-ever sales month was August 2013, when it sold 3,351 units. Counting all models and powertrains, Chevy sold 3,743 Sparks in April. So, does this success mean that Chevy is looking to bring the Spark EV to more markets? Bluhm said that GM is considering other states and is always looking at the business case, but has "nothing to announce yet." Related Video: The video meant to be presented here is no longer available. Sorry for the inconvenience.