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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.

Daimler says straight up it doesn't cheat on emissions tests

Distancing itself from VW and its diesel emissions scandal, Daimler has put out a statement saying that it has never installed devices on their vehicles that would artificially reduce emissions during a testing process. The company added that it "actively" supports European regulators' efforts to improve emissions-testing methods to better measure emissions during "real" driving conditions. BMW put out a similar statement last week, saying that its diesels are programmed to be tested properly. While Mercedes-Benz diesels were a fixture on US roads in past decades, the company's diesel sales are now concentrated overseas. "We categorically deny the accusation of manipulating emission tests regarding our vehicles," Daimler said in Friday's statement. "A defeat device, a function which illegitimately reduces emissions during testing, has never been and will never be used at Daimler." There's a reason for that sort of straightforward statement. Namely, heads continue to roll at VW after the automaker admitted it manipulated software in its diesel vehicles to pass US emissions testing. VW followed up by saying that as may as 11 million vehicles worldwide may contain that software and has set aside $7.3 billion to address the issue. VW CEO Martin Winterkorn stepped down as well. Take a look at Daimler's press release below. Daimler AG categorically denies any and all allegations of manipulation Stuttgart, Sep 25, 2015 In light of the ongoing assertions from the Deutsche Umwelthilfe (DUH), a non-government organisation, and the related speculation, Daimler AG once again clearly states that: We categorically deny the accusation of manipulating emission tests regarding our vehicles. A defeat device, a function which illegitimately reduces emissions during testing, has never been and will never be used at Daimler. This holds true for both diesel and petrol engines. Our engines meet and adhere to every legal requirement. In light of the written request by the DUH, which was sent to us this morning with a deadline to respond by 3:00 pm (CET), and the seven questions they posed, we can confirm that none of the allegations apply to our vehicles. The technical programming of our engines adheres to all legal requirements. We have no knowledge of measurements that indicate our vehicles did not meet legally required standards.

Consumer Reports selling its road-tested roadsters [w/video]

Here's a chance to acquire a celebrity-owned vehicles, and this time at a discount instead of a premium. So the celebrity in this case is Consumer Reports, that magazine that could be equally adored and abhored by car enthusiasts. CR buys all of its test vehicles and usually finds willing second owners within its own ranks, but its opening its small used-car lot to the public. On the forecourt are four roadsters: an automatic 2012 Audi TT 2.0 TFSI Quattro S-Tronic with 6,600 miles for $36,500, a manual 2012 BMW Z4 sDrive28i with 8,400 miles for $45,000, a manual 2012 Mercedes-Benz SLK250 for $39,500 and a manual 2013 Porsche Boxster with 7,000 miles for $48,000.
Those numbers mean a savings of $9,000 to $10,000 before haggling - each car is listed with an "Asking price" so there could be some wiggle room if you show up with pockets full of dough and eyes full of serious intent. Since the money CR earns from the sales go back into the magazine's budget to buy more test cars, however, it probably won't take any oddball trades, so you can forget about getting any purchasing help from that track-day AMC Javelin project on blocks in the back yard.
The vehicles have been taken care of and spiffed up for sale; buyers will take delivery at the CR test track in East Haddam, Connecticut and get a tour of the facilities. While you're there they'll even take you on a lap around the track so you can feel how your car handles when driven by one of its testers. They will probably not help you with advice on which toaster and dehumidifier to buy - you'll still need to get a subscription for that. Have a look at the video below to see a day in the life of a CR test car.