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Honda, Mazda, Mitsubishi, Mercedes also under diesel emissions scrutiny

The controversy over Volkswagen's diesel emissions scandal isn't limited to the US. In Europe, where diesel engines are far more popular, the issue is shining a harsh light on the NEDC emissions test. As already known, the evaluation does a poor job of reflecting real-world production of NOx, and it appears a significant number of automakers are affected. The Guardian in the UK has been reporting on real-world test results from a company called Emissions Analytics. After the latest round of checks, vehicles from Mercedes-Benz, Honda, Mazda and Mitsubishi were found to generate far more NOx than they should. The newspaper also published similar results for Renault, Nissan, Hyundai, Fiat, Volvo, Jeep, Citroen, VW, and Audi. On average, the figures are about four times over the limit of producing the pollutant. Unlike VW and its defeat device, these automakers aren't actually breaking the rules. The vehicles perform up to the NEDC lab test for emissions, but those results simply aren't translated to the street. "The VW issue in the US was purely the trigger which threw light on a slightly different problem in the EU - widespread legal over-emissions," Nick Molden from Emissions Analytics said to The Guardian. A big fight to decide the future of this issue appears to be on the horizon. Automakers claim that they can't meet the next round of tightening emissions regulations and are asking for compromises. Although, spokespeople for Mercedes and Honda told The Guardian that the brands would be in favor of the stricter rules. Meanwhile, some European governments began backtracking their support of diesels well before this scandal came to light. The added scrutiny certain hasn't helped the future of the oil-burner. Related Video:

Mazda CX-5 updates bring nav to more trim levels

The refreshed 2016 Mazda CX-5 is already one of our favorite crossovers of its size for the model's engaging driving experience, upscale interior, and slick infotainment system. For a new 2016.5 model year upgrade that arrives in January, Mazda gives customers even more standard features to enjoy, but prices also tick upward. The Japanese automaker just gave the 2016 CX-5 light upgrades like LED signature lights and an update to the Mazda Connect infotainment system. The 2016.5 updates add a backup camera on every version except for the base front-wheel drive Sport with the six-speed manual. For buyers considering higher trims, all Touring and Grand Touring models get the welcome inclusion of standard navigation, and the Touring now comes with heated front seats, too. The extra tech comes with a jump in cost. As of Dec. 15 Mazda increases its delivery and destination charge from $820 to $900 for crossovers and $835 for cars. The change brings the base price of the front-wheel drive 2016.5 CX-5 with a manual gearbox to $22,695, and the top-spec all-wheel drive Grand Touring now retails for $30,770. 2016.5 Mazda CX-5 Adds More Standard Features to Best-Selling Compact Crossover - Backup Camera Now Standard on Most Trim Levels, Navigation Added to CX-5 Touring and Grand Touring - IRVINE, Calif., Dec. 18, 2015 /PRNewswire/ -- Just in time for Christmas, Mazda North American Operations (MNAO) has announced pricing and packaging for the 2016.5 Mazda CX-5 compact crossover, adding value and reducing complexity in CX-5's trim level structure. 2016.5 Mazda CX-5 Adds More Standard Features to Best-Selling Compact Crossover New for the mid-model year, a backup camera is now standard on all trim levels equipped with Mazda's SKYACTIV-Drive six-speed automatic transmission. CX-5 Touring models gain standard navigation and heated front seats. CX-5 Grand Touring models also add navigation as standard equipment. "The added content in 2016.5 CX-5 reflects our customers' tastes toward premium features in a compelling, fun-to-drive, stylish crossover," said Robert Davis, Senior VP of U.S. Operations, MNAO. "CX-5 buyers are educated, upwardly mobile, active-lifestyle individuals. With these updates, we aim to provide them with an even greater ownership experience." Previously, CX-5's backup camera was part of the Rear View Camera Package on the CX-5 Sport trim level. Navigation was available in the CX-5 Touring and Grand Touring Technology Packages.

Mazda Skyactiv-X Review | The revolution begins with a squeeze-bang

The matte black Skyactiv-X prototype looks like a rough Mazda3, perhaps reconstructed after a bad wreck by an over-enthusiastic owner of a spot welder and lots of gaffers' tape. Ribbed ducts poke out of the dash sending two breaths of conditioned air to no one in particular. Even its revolutionary engine, the thing we're here to experience, is entombed in a massive, nondescript cover to mask its unseemly noises. It's a wild, strange way to meet a very unconventional vehicle that promises diesel-like fuel economy, a wide torque band, and an exotic method for burning less gas than ever before. It takes a few hours for Mazda's engineers to explain the fundamental principles of operation. For more detail, read our Skyactiv-X Spark Controlled Compression Ignition explainer, but here's a very brief overview. Skyactiv-X marries some traditional gasoline engine characteristics with a novel form of compression ignition called SPCCI. The key for Skyactiv-X is to use very high compression in the cylinder and an extremely lean fuel-air mixture. Squeezed right to the cusp of getting hot enough to blow up all on its own (which is very hard to predict), a squirt of extra gas and a spark interject to cross that compression-ignition threshold in a controlled and predictable manner. See the animation below: That takes a few essential components to get just right. One is a massive amount of computer processing power and some pressure sensors in the individual cylinders, because the ambient conditions change how and when these things happen. Skyactiv-X uses a clutched supercharger to pump in additional air when needed to nail the mixture precisely, and high-pressure injectors to get the low ratios of fuel to disperse properly in the chamber. And since it operates like a conventional gasoline engine sometimes, it uses valve timing to lower the very high compression ratio so it doesn't reach combustion ignition in that mode. In practice, the Skyactiv-X runs in compression ignition mode most of the time. In practical terms, that means it drives like a torquey gasoline Skyactiv engine. The torque curve is broad and flat — diesel-like in that respect. That also means it can get away with using a six-speed transmission and a lower final drive for better response. There's enough grunt and economy together that Mazda can let the engine spin faster — at 60 mph, it's running at roughly 1,000 more RPM than a similar gas engine, with greater efficiency.