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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.

Project Maybach is an absurd, awesome off-road electric coupe

Mercedes has created some mighty unusual concepts for the Maybach luxury brand. The Exelero high-speed test car and the Ultimate Luxury SUV sedan come to mind. But the Project Maybach, designed in collaboration with late fashion designer Virgil Abloh, may be the wildest yet, being an electric off-road coupe. It's not just the fact it's a two-door off-road coupe. It's the fact that it's a nearly 20-foot-long two-door off-road coupe. And it has very traditional proportions and lines, with a gargantuan front end, and a somewhat less gargantuan rear end. It's squared-off, but in a more elegant, midcentury luxury car way than say, a Hummer. And of course, it has a huge chrome grille and highly embellished taillights, complete with Maybach logos. And yet, this old-school coupe sits high off the ground. It rolls on small, steel-style wheels with chunky tires. It even has skid plates, bolt-on fender flares, rock rails and a roll cage with a roof basket. It's all painted in a matte tan paint that makes it look like a desert-ready expedition vehicle. It's even arguably practical for expedition work. The somewhat spartan-looking interior has tan leather seats that recline fully flat for sleeping. Being an electric car with long areas unoccupied by people, plus that roof basket, it likely has loads of cargo space. On the hood are solar panels that might provide a bit of range, but would at least be handy for recouping some power for accessories. The interior seems to have additional storage bins and tools stowed in special compartments around the cabin. As for the actual performance and range, well, Mercedes has nothing specific. That's not entirely surprising, since this seems to be solely a design exercise. As such, don't expect to see a production model anytime soon. Then again, off-road luxury vehicles are certainly popular. Maybe Mercedes would consider it if there were enough seriously wealthy customers expressing interest. Related video:

Top 10 small cars with the longest total driving range

Editor's Note: Since this article was originally posted in the spring of 2015, much has changed in the automotive landscape, especially among those shopping for small car economy. With thanks to Volkswagen for their blatant cheating – and subsequent cover-up – on diesel emissions, the largest player in the diesel passenger car segment isn't playing – they're paying; billions are going for both car buybacks and federally-imposed penalties. And for a few VW execs there exists the very real possibility of jail. With the absence of a big player and the abrupt entrance – via Chevy's new Bolt – of an affordable EV with 200+ miles of range, we've limited the diesel listings to Jaguar's new XE. And for those wanting an updated look at efficiency and range, Autoblog has it – or the EPA has it. Long before electric vehicles were part of the mainstream conversation, car lovers and skinflints alike would boast about the total range of their vehicles. There's something about getting farther down the road on one tank of gas that inflames the competitive spirit, almost as much as horsepower output or top speed. Of course, the vehicles with the very best range on today's market are almost all big trucks and SUVs; virtually all have the ability to carry massive reserves of fuel. Top up a standard Chevy Suburban and you can expect to travel almost 700 miles (you'll need to stop before the Suburban stops...), while a diesel-fed Jeep Grand Cherokee manages almost as many. But what about vehicles that are smaller? The EPA has, essentially, three classifications for 'small' vehicles: Minicompact, Subcompact and Compact. All three are measured based on interior volume, meaning that some cars with rather large exterior dimensions and engines slot in next to traditional small cars. But even though impressive GT coupes from Porsche, Bentley and Mercedes-Benz may have much larger gas tanks to feed their powerful engines, that capacity is offset by higher rates of consumption... in most cases. We used the EPA's Fuel Economy Guide for model year 2017 cars as a start, calculating the official highway miles per gallon rating with each vehicle's tank capacity. The resulting numbers aren't necessarily real world, but they do offer a spectrum for total theoretical range. The eventual top ten surprised me on a few occasions, and comprised quite a varied list of vehicles. 10.