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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.

Vettel hopes to pull off some Ferrari 'tricks' to end Mercedes F1 dominance

MONTREAL — Sebastian Vettel says Ferrari has a few tricks up its sleeves for this weekend's Canadian Grand Prix and will need to conjure up something special if it is to end Mercedes' magical run. Six races into the season, Vettel is not ready to wave the white flag and concede the title to Mercedes, which has racked up six straight wins, five of them with 1-2 finishes. But the German admits the battle had reached a critical juncture. "The next races will be really crucial for us to try and get back to the front and give a much harder time to Mercedes," said Vettel, who finished second in Monaco last month for Ferrari's best result so far this season. "It will be crucial to do it rather sooner than later, but at the moment I am not too fussed, I am not looking at, 'OK this is the date.' "Clearly we are behind, clearly there is a big margin between Mercedes and the rest and we have to lose that gap and get ahead otherwise it will be difficult to turn around. "That is as much realism as you can get."Vettel won from pole position in Canada last year and Mercedes has suggested the high-speed circuit could again favor Italian rivals whose season has yet to get into gear. But Mercedes drivers Lewis Hamilton and Valtteri Bottas will like their chances as well on the Circuit Gilles Villeneuve. Hamilton was fastest in Friday's early practice, but damaged his car when he hit the wall in the afternoon. The five-time world champion sits 17 points clear of Bottas at the top of the standings and in his bid to equal Michael Schumacher's seven Canadian Grand Prix victories between 1994 and 2004. Not that Mercedes needed another boost, but Hamilton and Bottas will have new and upgraded engines in their cars for this weekend's race. Ferrari has already introduced its first upgraded powerplants of the season, but Vettel was optimistic tweaks to the car would benefit them on a circuit that plays to some of their strengths. "There is always little tricks you can do, the question is whether they make a difference," Vettel said. "But I am not sitting here trying to paint things black we haven't done a single lap this weekend so I am quite optimistic it was a strong track for us last year. "We have some tricks up our sleeves whether they work or not we will see.

Aston Martin's deal with Mercedes-AMG more than skin-deep

Aston Martin is working on a raft of new models. But it's not going it alone: it has a technical partnership with Mercedes-AMG, the details of which have only been revealed in bits and pieces. If these latest spy shots are anything to go by, however, the arrangement could run deeper than anyone initially let on. Spied undergoing testing at the Nurburgring, this prototype for the upcoming successor to the Aston Martin DB9 is widely expected to be called the DB11 (10 is being used by James Bond's new ride). From the outside it doesn't look different than the previous versions we've seen running around, but this time we can also peer into the cabin, and that's where things start to get interesting. Despite the best arm-waving efforts by the development engineers, our spy photographers managed to snap a couple of shots of the interior. And though it looks far from being ready for production, the components we see appear to have been lifted from the Mercedes S-Class Coupe – particularly the steering wheel, digital instrument cluster, and almost the entire center console. This speaks to a deeper collaboration between the British and German automakers. The 4.0-liter twin-turbo V8 from the Mercedes-AMG GT, C63, and G500 4x42 is already being adapted for use in the next generation of Astons. Related Video: