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Autoblog's adventures at the Nurburgring 24-Hour race [spoilers]

The brand-new Audi R8 LMS, said to share 50 percent of its components with the street-legal R8 shown off at Geneva, has won its very first race at the 2015 Nurburgring 24-Hours. The No. 28 car driven by Christopher Mies, Edward Sandstrom, Nico Muller, and Laurens Vanthoor for the Audi Sport WRT team out of Belgium finished only 40.279 seconds ahead of the No. 25 BMW Sport Team Marc VDS Z4 GT3 in second place, for the smallest winning gap since the race began in 1970. Those two cars traded the lead throughout Sunday morning and were less than a minute away from one another for the last two hours. They were part of a total 35 lead changes during the entire race – a record for the event – and both did 156 laps. Third place went to the No. 44 Falken Tire Porsche 997 GT3, one lap down. The Audis did what they always do: lurked close to the front, stayed out of trouble, then pounced when everyone else faltered. For the opening stretches the BMW Z4 teams owned it, running 1-2-3 for a while, but all of them hit trouble. When morning came and the race got over its yellow-flag fever, the No. 28 Audi was in front and stayed there. It was the third Nurburgring 24-Hour win for Audi in four years, the brand's first win only coming in 2012. Last year's winner, the Phoenix Audi team that set a race record by doing 159 laps, had both of its cars retire. One hit an oil patch about 12 hours in, spun and was hit by another car behind, taking on too much damage to continue. The other retired with engine issues. Other Notes Three cars crashed out of the race while leading, after the rains that weren't supposed to happen, happened about 90 minutes in. The No. 20 Schubert BMW Z4 led the first 50 minutes of the race, hopped a crest at Pflanzgarten, landed in a pool of water, and hit the wall on the 30th lap. Then the No. 30 Frikadelli Porsche, with a driver team that included ex-'Ring Taxi driver Sabine Schmitz, hit the No. 31 Mercedes SLS AMG GT3 on the approach to Carrousel and crashed out. Then the No. 1 Phoenix Audi, last year's winning car, took the lead but hit the wall after that oil patch near Pflanzgarten and was out of the race. Aston Martin celebrated a class win in the SP8 category with the No. 49 Vantage GT4 N430. This being the tenth anniversary of the Vantage running the Nurburgring-24, this year's car was painted in the same colors as the racecar from ten years ago.

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

Why it's difficult to accurately test the efficiency of a plug-in car

When it comes to electric vehicles and plug-ins in general, the Environmental Protection Agency-certified range is a hugely important number. While actual range anxiety is largely psychological, the magic number does provide a point of comparison of buyers considering one EV over another. The driving distance is also often touted by automakers when marketing their models. Unfortunately, as Green Car Reports finds in a recent deep dive, the way the EPA calculates the figure is a convoluted mess, and discovering the reasons why is definitely worth the read. The issue isn't about bad science but instead comes down to vague wording. The EPA's accepted range test is sourced from an evaluation called J-1634 from the Society of Automotive Engineers, and it seems to provide balanced results for vehicles that automatically reach a single state of charge when plugged in. However for models with multiple charge settings, the situation gets complicated very quickly. Of course, these modes are often created in the software, meaning that a car's certified driving distance can change with just a few taps of the keyboard without the real world results owners might experience actually changing. By showing the test's effects on the certified range for the Tesla Model S, Nissan Leaf and Mercedes-Benz B-Class Electric Drive over the last few years, Green Car Reports makes a compelling argument that it's the evaluation that needs to change. Thankfully, it appears that the solution is a very simple one. Get the details here.