1983 Mazda Rx-7 Limited Edition T731345 on 2040-cars

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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 Slovakia brochure reveals Skyactiv-X Euro power numbers

After driving a prototype of Mazda's Skyactiv-X engine in a Mazda3 in January last year, we wrote, "If you want to talk numbers, they're understandably fuzzy. The Skyactiv-X tune isn't final yet, so horsepower and torque figures are a moving target." They're no longer fuzzy in Slovakia, where a brochure for the new Mazda3 sells final figures as 181 metric horsepower and 222 Newton-meters, or 178 horsepower and 164 pound-feet. We don't know the Slovakian engine's displacement. If that Skyactiv-X is a 2.0-liter, it compares to our 2.0-liter Skyactive-G in the Mazda3 that makes 155 hp and 150 lb-ft, or the tuned Skyactiv-G in the 2019 Miata that makes 181 hp and 151 lb-ft. According to the spec sheet on the Slovakian Mazda site, their 2.0-liter Skyactiv-G in the CX-3 makes 148 hp and 152 lb-ft, and in their Mazda6 makes 162 hp and 155 lb-ft. According to the brochure, those numbers will rise to 164 hp and 157 lb-ft in the coming Mazda3. The Skyactiv-X numbers are in sight of what reps at Mazda in California gave us for output during our drive, which was closer to 190 hp and 180 lb-ft. Mazda said at the L.A. Auto Show last year that the Skyactiv-X would launch in markets with stricter emissions regulations first, so a small European market with tighter controls doesn't define what we get. Given our less restrictive environment, tuning for more power shouldn't be a moon shot. Doing so would put the Skyactiv-X in with the optional 2.5-liter four-cylinder in the U.S. Mazda3, which makes 184 hp and 185 lb-ft. The real test will be gas mileage; the purpose of the Skyactiv-X is to provide those figures in company with 20 to 30 percent better fuel economy than the Skyactiv-G. Autoweek characterized Mazda CEO Akira Marumoto's comments on the engine as, "The Skyactiv-X variant will be positioned as the higher grade. It will have the driving dynamics of the 2.5-liter gasoline setup but the fuel economy of a 1.5-liter diesel." We have questions about this strategy, but we'll have to see how the pricing works out. Since the 2.5-liter serves as the base engine on the 2019 Mazda3, buyers can expect a meaningful premium to get into a Skyactiv-X. Right now, there's a $1,495 surcharge to go from the current 2.0-liter Mazda3 hatch to the 2.5-liter.

Mazda boss says no to new-generation Mazda3 hot hatch

Mazda offered a hot, turbocharged version of the Mazda3 model during the car's first two generations, badging it either the MPS or the Mazdaspeed 3 depending on the market. The third generation car didn't get a hot-hatch variant, and now Mazda is saying there won't be one for the freshly revealed fourth-gen car, either. Mazda's new global boss, Akira Marumoto, told Australian motor journalists at the Los Angeles show that there won't be an MPS in the cards. As Drive quotes Marumoto: "Mazda is a small player, and if [you are asking whether] that segment has a high particular priority for Mazda, my answer would be no. Therefore we not planning for MPS in the future." Marumoto stated that Mazda would rather establish itself as a genuine premium carmaker comparable to its European rivals, stressing that this would be achievable through quality, comfort and refinement improvements in the existing lineup rather than expanding into other segments. As well as nixing the Mazda3 MPS, Marumoto also said that despite repeated queries, the function of the 2015 Tokyo Motor Show car RX Vision was to preview the evolution of the Kodo design language and not to herald the arrival of a new rotary sportscar. So, it's time to cue the Mazda Kills Rotary Sports Car Again headlines. Marumoto also told journalists that there won't be an EV sports car or a completely driverless car from Mazda either: He said he prefers the smell of gasoline to full electric power, and that Mazda will never build a car without a steering wheel. For Mazda, autonomous capabilities would serve to bring the car to a safe halt in the case of an incapacitated driver, instead of doing the driving. However — and there is a strong "however" — Mazda did tell us that the turbocharged 2.5-liter engine does fit into the new 3. Mazda representatives said that the header on the naturally aspirated version is big enough as it is, making it easy to shoehorn in the 250-horsepower turbo version without issue. They also said that the company is closely monitoring buyer demand, which originally led to the turbo being available on the Mazda6 and CX-5, along with justifying the introduction of all-wheel-drive in the new Mazda3. So: if there is a case for it, the turbo might come — just don't call it a Mazdaspeed 3, or view it as an overt hot hatch. But the shoe fits.