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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.

Mercedes-Maybach GLS prototype caught testing with its big new grille

The new Mercedes-Benz GLS is a massive tech fortress on wheels, so the Maybach GLS is bound to be a massive tech castle. Last we heard from the gigantic Benz SUV was that it was going to be built at Mercedes’ Alabama plant. With a starting price expected to be around $200,000, itÂ’ll probably be the most expensive vehicle produced in the U.S. These spy shots give us an idea of what weÂ’re going to be looking at when the production SUV is finally revealed. Our first hint that this prototype is a Maybach is the grille. It looks suspiciously similar to the grille on the Vision Mercedes-Maybach Concept with all the vertical slats running down the big maw. Minimal camouflage is disguising the exterior for the most part, but we imagine Mercedes is hiding any of the gaudier parts of the car itÂ’d like to save for a big reveal. The exhaust outlets sure do look a bit different than the regular GLS, but the outside is generally the same as what we see today. As for the interior, thatÂ’s where most of the magic is expected to happen. A significantly overhauled look is inevitable, with the focus on even more luxurious materials than the most expensive norm-core GLS. A rear seat that's fit for a king or two is likely, along with Maybach-exclusive tech to boot. For now, we canÂ’t see in the heavily camouflaged and taped-off windows, leaving us to wonder about the luxury within. This Mercedes-Maybach is expected to compete with other massively expensive SUVs like the Bentley Bentayga or a fully decked-out Range Rover.  Everything thatÂ’s optional on the GLS should come as standard here, including the trick E-Active Body Control suspension. Look for a reveal coming in the not-so-distant future, as this prototype doesnÂ’t look terribly far from production to us. Featured Gallery Mercedes-Maybach GLS View 12 Photos Spy Photos Maybach Mercedes-Benz SUV Luxury

Recharge Wrap-up: BMW i8's Engine of the Year, biodiesel producer guilty

BMW has won International Engine of the Year for the hybrid system in the i8. The i8 PHEV uses a 1.5-liter, three-cylinder gasoline engine with a hybrid drive unit including a 96-kilowatt electric motor. BMW beat Ford's 1.0-liter EcoBoost engine by a small margin to win the award for best overall engine. It also took the award for the 1.4-liter to 1.8-liter category, as well as best new engine. Tesla beat BMW to win the green engine category for the electric powertrain of the Tesla Model S. Read more at Green Car Congress, or see all of the results from the International Engine of the Year Awards. The head of Audi powertain development is quitting as the automaker steps up electrification. Stefan Knirsch has worked at Audi since late 2013, and previously worked at Porsche as the head of quality management and engine development. Germany's Auto Motor und Sport magazine had reported that Knirsch was leaving Audi, which Audi confirmed without giving a departure date or saying if he would be working elsewhere. Audi has been feeling pressure from its competitor Mercedes-Benz, and has been working on improving its EV offerings and autonomous vehicle technology. Read more from Reuters. The owner of a biodiesel company has pleaded guilty to fraud. Philip Joseph Rivkin, aka Felipe Poitan Arriaga, took part in a scheme to defraud the EPA, falsely claiming to be producing millions of gallons of biodiesel. This allowed his company, Green Diesel, to receive renewable fuel credits and sell them to oil companies and brokers. "These crimes are a serious threat to an important program that helps combat climate change," says Cynthia Giles of the EPA. "Companies and individual managers should get the message that there are serious consequences for breaking the rules and undermining the integrity of this program." Rivkin faces over 10 years in prison and $51 million in restitution. Read more in the press release below. Biodiesel Fuel Company Owner Pleads Guilty to Fraud and Clean Air Act Crimes Connected to Renewable Fuels Scheme Philip J. Rivkin faces more than 10 years imprisonment and $51 million in restitution WASHINGTON – Philip Joseph Rivkin, a.k.a. Felipe Poitan Arriaga, 50, today pleaded guilty to a Clean Air Act false statement and mail fraud as part of his role in a scheme to defraud EPA by falsely representing that he was producing millions of gallons of biodiesel fuel.