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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.

Aston Martin and Mercedes-AMG formalize technical partnership

The development of a partnership between Mercedes-Benz and Aston Martin has been a long time coming. The news dates back to 2008, and over the five years since was supposed to lead to a rejuvenation of both the Maybach and Lagonda brands. That program ultimately fell apart, but the tie-in was forged afresh in July when the two automakers signed a letter of intent over a renewed partnership. And now that partnership has been formalized.
In a deal just announced, Mercedes-AMG will build a new V8 engine for Aston Martin that will power a new generation of luxury GTs for the British marque, presumably to replace the 4.7-liter V8 in the Vantage. The relationship appears to be similar to the one already in place between AMG and Pagani, only in this case, will involve Daimler taking as much as a five-percent stake in Aston Martin and an observer seat on Aston's board.
The technical partnership is also set to lead to the supply of electric and electronic systems, and could incorporate "additional areas of cooperation in the future." Whether that will include a fresh attempt at reviving Lagonda remains to be seen, as does the future of Aston's long-serving, Ford-based 6.0-liter V12 engine. But for now you can read the full announcement below.

2016 British Grand Prix kept mostly calm and carried on

Three bursts of chaos decided the course of the British Grand Prix. The first was a literal cloudburst a dozen minutes before the race, which poured water on the Silverstone Circuit while drivers sat on the grid. Six minutes before the lights-out, the race director decided to start the race behind the Safety Car. The field loped around the wet track for five laps. When the Safety Car pulled off, the three leaders – Mercedes-AMG Petronas' Lewis Hamilton, followed by teammate Nico Rosberg and Red Bull's Max Verstappen – stayed out. Behind them, the second chaotic moment occurred: a big group of drivers made pit stops for intermediate tires. When Manor's Pascal Wehrlein spun at Turn 1 on Lap 7, officials issued a Virtual Safety Car. With the rest of the field slowed down, the three leaders ducked into the pits on Lap 8 for intermediates. The fortuitous timing meant all three drivers rejoined the track in their original positions. By Lap 9, with racing resumed, Hamilton had a 4.9-second lead on Rosberg. From that point, even as the track dried, no one bothered Hamilton during what one commentator called "a measured drive." The Brit won his home grand prix, taking the checkered flag seven seconds ahead of Rosberg. Rosberg had to earn second place on track. The German's car didn't respond well to the intermediate tires, so Verstappen excecuted an outstanding pass on Rosberg on the outside through Chapel on Lap 16. After everyone switched to slicks, Rosberg's Mercedes reclaimed its mojo and the German hunted Verstappen down, passing the Dutchman on Lap 38. The final touch of chaos happened when Rosberg's gearbox threw a tantrum on Lap 47 of the 52-lap race. Rosberg radioed his engineer, "Gearbox problem!" His engineer replied, "Affirm. Chassis default zero one. Avoid seventh gear, Nico." The race stewards allowed the engineer's first two statements, but stewards said the instruction about seventh gear contravened the rule that "the driver must drive the car alone and unaided." After the race, officials added ten seconds to Rosberg's time, demoting him to third behind Verstappen. Rosberg's is the first penalty arising from radio communication restrictions. Unsurprisingly, Mercedes will appeal. At this year's Baku race the radio controversy stemmed from engineers refusing to tell drivers what to do. Now we know what happens when the pit wall gets loose lips.