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Japan plans real-world diesel emissions test after companies fail

Japan's transport ministry plans to start real-world diesel emissions tests after an experiment found four models from Toyota, Nissan, and Mitsubishi that produced more nitrogen oxide (NOx) emissions than the nation's rules allow, according to The Japan Times. Regulators there usually only perform emissions checks in the lab. The VW diesel scandal has everyone double-checking their figures. Diesel versions of the Toyota Hiace van, Land Cruiser Prado, and Nissan X-Trail produced up to 10 times more NOx than allowed. The Mitsubishi Delica D:5 was up to five times over the limit, The Wall Street Journal reports. There was no evidence of defeat devices in the vehicles. Mazda performed well in the experiment, though. The CX-5 passed with nearly the same results on the road and in the lab. The Demio, better known as the Mazda2, did nearly as well with only slighter higher figures in the real world than in the controlled setting. The experimenters theorized the reason for the excessive emissions was that cold weather caused the engines' software to shut off the exhaust gas recirculation to prevent damage, according to the WSJ. However, this behavior also increased NOx production. Toyota, Nissan, and Mitsubishi don't have to worry about punishment from the transport ministry because this check was just an experiment. Their models already passed the mandated lab tests, which was the only requirement, according to The Japan Times. As governments begin greater real-world emissions tests, the results suggests diesels aren't very clean. A recent check in France found models from Ford, Renault, and Mercedes-Benz that didn't perform up to the standards. Regulators in India conducted similar evaluations and ordered VW to recall over 300,000 vehicles. Related Video:

Mazda shows lightweight MX-5 Spyder and Speedster at SEMA

Ever since Mazda dropped the first teaser on us last week, we've been looking forward to seeing what it had in store for us at SEMA this year. Now we've seen it what Mazda has dubbed the MX-5 Spyder and MX-5 Speedster, and they were worth the wait. The Spyder goes vintage with a silver paintjob and a brown top stretched overhead. It also has an aero kit, grille, and tonneau cover done up in carbon fiber, rides on 17-inch wheels, and features a natural leather interior. The blue Speedster, meanwhile, goes for the stripped-down, wind-in-your-hair experience. It has no roof or windshield, just a tiny deflector at the front of the dashboard. It's dropped an inch closer to the ground on an adjustable coilover suspension with 16-inch alloys, and features a center-exit exhaust. Carbon fiber helps trim 250 pounds from the curb weight, along with a stripped out interior trimmed in Alcantara. Both look pretty slick, and disappoint only in so far as they (like so many of their predecessor concepts) won't be heading for production. If they were, we'd be hard pressed to choose between the two. Which would you go for? Mazda Reveals Extreme Lightweight Design Concepts at 2015 SEMA MX-5 Concepts Display Two Different Takes on Staying True to Pure, Lightweight Sports Car Philosophy LAS VEGAS (November 3, 2015) – Mazda revealed two design concepts today at the SEMA Show in Las Vegas, based on its all-new 2016 MX-5 Miata—MX-5 Spyder and MX-5 Speedster—demonstrating two vastly different takes on lightweight, open-air performance. Lightweight. Fun-to-drive. Roadster. Those three tenets have served as the foundation for the Mazda MX-5 Miata since its 1989 introduction and continue to serve the new fourth-generation model. Focused, lightweight engineering is a guiding principle of every Mazda vehicle made with SKYACTIV Technology, allowing for greater efficiency, improved performance and agile handling dynamics. But what if that sense of lightweight performance were taken to the extreme? What if Mazda's North American designers harkened back to vintage roadsters to create thoroughly modern, bespoke concepts for what a lightweight performance car should be The results would be the MX-5 Spyder and MX-5 Speedster concepts. "Both MX-5 Spyder and MX-5 Speedster are uncompromising designs that highlight the core strengths of MX-5," said Ken Saward, design manager, Mazda North American Operations.

Weekly Recap: Mazda's rotary revival ignites Tokyo Motor Show

Forty-eight years ago Mazda pioneered rotary engines in the Cosmo Sport. Mazda then honed the technology, won with it on the racetrack, and made it one of its signature features. If you're an enthusiast, rotary was a reason you like Mazda. It's a great part of the company's past. But until this week, that's exactly what we thought it was. History. That all changed with the reveal of the RX-Vision concept at the Tokyo Motor Show, which reignited the passions of the Mazda faithful. Suddenly, rotary was no longer a relic. The rotary concept shown in Japan was a front-engine, rear-wheel-drive sports car wrapped in the company's latest Kodo design language. It's powered by a Skyactiv-R unit (R for rotary), though specs were not disclosed. Mass production is "currently on hold," Mazda said, maintaining it never stopped development of rotary technology, even after the demise of the RX-8. Beyond that, we know nothing, other than the optimistic statement Mazda offered that: the "RX-Vision represents a vision of the future that Mazda hopes to one day make into reality." Put simply: we agree. OTHER NEWS & NOTES: Subaru previews next-gen Impreza While the Mazda concept was the headliner from Tokyo, Subaru's Impreza design study also stood out. The five-door concept is a signpost for the look of next-generation Impreza. It blends sportiness with functionality, and it's wrapped in a striking shade of 'high-luminance silver.' The fenders are flared to signal Subaru's all-wheel-drive capability, and the front has futuristic headlights that look like something from an Audi E-Tron concept. While most of this will be toned down in production, the concept suggests an elevated style for the Impreza, which is due as a 2017 model. Porsche adds potent GTS model to 2017 Macan line Porsche is giving the Macan crossover the GTS treatment, which will start at $68,195 when it goes on sale in March. GTS translates to more power, a sportier suspension, and interior and exterior design cues that sharpen the looks and reflexes of one of the most athletic SUVs on the market. Porsche recalibrated the 3.0-liter twin-turbo V6 from the Macan S to make 360 hp and 369 lb-ft, (up from 340 hp and 339 lb-ft in the S). It teams with a seven-speed PDK gearbox and all-wheel drive. An air suspension is standard. The body features a slew of black accents, and the standard 20-inch RS Spyder wheels are done up in a shade of satin black. The cabin gets leather, Alcantara, and GTS logos.