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EPA message to automakers: You're on notice

With top administrator Gina McCarthy speaking about the "moral obligation for climate action" on Friday, the Environmental Protection Agency announced it would ramp up its oversight of the auto industry in the wake of Volkswagen's emissions cheating. In a letter sent to manufacturers Friday, the agency said it would begin examining cars to see whether they contained defeat devices "in addition to the standard emissions test cycles." "We are putting vehicle manufacturers on notice." Exactly how the agency plans to test for these devices – which are not devices per se, but algorithms contained in millions of lines of software code that govern vehicle functions – remains unclear. Christopher Grundler, the director of the EPA Office of Transportation and Air Quality, divulged few details in how the agency would uncover so-called defeat devices used by cheaters. "Not today – or actually ever – I'm not going to be describing what new ways we'll be using to detect these defeat devices." Later, he said engineers will have to "come up with some clever ways to do this." The only insight he offered was that the EPA, California Air Resources Board, and Environment Canada would partner on testing more cars for emissions and anomalies. Grundler also said the EPA would diversify its testing fleet. In addition to relying on vehicles provided by manufacturers, the federal agency will now also borrow cars from "private citizens" and utilize rental cars for tests. "We are putting vehicle manufacturers on notice," he said. Joint investigations between EPA and CARB have "been very successful in protecting human health and the environment," said Janet McCabe, the agency's acting administrator in the Office of Air and Radiation. "But we also know, and the Volkswagen violations before us now make it clear, we need to adapt and step up our oversight." That may include an increase in on-road testing in addition to the five emissions tests now more relied upon. The EPA owns and maintains 23 portable emissions-monitoring systems like the one used by West Virginia University researchers who first detected elevated levels of nitrogen oxide emissions from two Volkswagen diesel vehicles. Right now, they're almost exclusively deployed to monitor emission from heavy-duty vehicles, whose NOx emissions "dwarf" the amount produced by light-duty vehicles, which produce less than 2 percent of the total, according to the agency's figures.

TRANSLOGIC 150: Volkswagen XL1

How do you build the world's most fuel-efficient production car? Start with the world's most aerodynamic design. The Volkswagen XL1 is capable of 261 miles per gallon thanks to its sleek shape and ultra efficient plug-in diesel hybrid powertrain. The downside is that only 250 will be made and none will be sold stateside. That didn't stop us from taking our turn behind the wheel of this truly revolutionary ride.

Audi RS3 and Volkswagen Golf R face off in Evo test

Typically when an automotive publication pits two rivals against each other, they come from different companies. After all, why would one automaker – even one parent company – develop two distinct models to compete against each other? Well, the Volkswagen Group isn't like most. It pits Porsches against Lamborghinis, Audis against Bentleys, Seats against Skodas... all under the same roof. In the high-powered hot hatch market, it offers both the VW Golf R and the Audi RS3. The question is, which is the better drive? Evo put them both on track for a quick bout of sibling rivalry to find out. On paper it would seem like an unfair fight. Sure, both are based on the same platform and channel their power to the tarmac through all four wheels. But the Audi's five-cylinder engine packs considerably more muscle than the Golf's four: 362 horsepower and 343 pound-feet of torque trump 296 hp and 280 lb-ft. There's just no way around that – at least until the Golf R 400 comes along. The Audi, as you might have guessed, also costs substantially more than the Volkswagen. But that's not Evo's concern here. This is a cost-no-object, bare-knuckle throw-down. Watch the ten-minute video above to find out if the cheaper, less powerful Golf R can keep pace with its more upscale and brawnier brother. Related Video: News Source: Evo via YouTube Audi Volkswagen Hatchback Performance Videos vw golf r evo