2014 Mazda Cx-5 Grand Touring 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 going back to oval grille with next MX-5 Miata

The original Mazda MX-5 Miata was distinguished by an oval grille - a design trait that gradually evolved into the smiling cat face on the latest model. But Mazda, according to the latest intel, is planning on returning to that oval grille with the new model in the works.
The revised grille will cap a slightly longer form than models past, while still keeping weight down to a minimum. The stretched wheelbase was reportedly adopted in order to meet the requirements of Alfa Romeo, which is jointly developing the new platform together with Mazda for use on a new roadster of its own.
The new Miata is expected to adopt the 1.5-liter Skyactiv four found in the Mazda3, albeit returned to rev higher and deliver more power and torque, mated to either a six-speed manual or automatic. The Alfa version, meanwhile, is expected to use a 1.4-liter turbo four with a dual-clutch transmission. Sources anticipate the new MX-5 to debut first, possibly at the 2015 Chicago Auto Show a little less than a year from now.

2020 Mazda MX-5 Miata Suspension Deep Dive

Full disclosure: I’m a longtime Miata fan. And by longtime I mean since mid-1989, the year I obtained, through a series of fortunate connections, one of the three original Chicago auto show display cars. But this was no blatant attempt to butter up a journalist – I barely knew how to spell the word. At the time I worked for the Department of Defense and was racing SCCA showroom stock on the side. It was destined to be a racecar. I was assured itÂ’d be quick, but doubts surfaced when I arrived at MazdaÂ’s dealer training center to pick it up. “Oh, itÂ’s that cute Elan-looking thing,” I probably said. But my mind was utterly changed when I eyeballed its double-wishbone suspension and other cleverly engineered features hiding beneath its skin. In subsequent years of racing – and eventually restoring – that car, I spent uncountable hours being impressed by it. I can safely say that the new ND Miata (2016 - present) is the best yet. ItÂ’s lighter than it has been in 20 years, and thatÂ’s some trick considering the relentless march of safety requirements and expected convenience features. This car is actually 1.3 inches shorter from nose to tail than my NA Miata, but itÂ’s also 2.4 inches wider and rolls on a wheelbase that is 1.7 inches longer. But it is the suspension that has always made the Miata great. This look under the skin of a 2020 Mazda MX-5 shows why the ND is the best Miata in that arena, too. The fact that this is an RF model doesnÂ’t much matter one way or the other.   As it was the first time I laid eyes on one, things got off to a promising start as soon as I pulled a wheel off. ItÂ’s clear that this is no mere strut suspension, as we can see a coil-over shock and glimpses of aluminum.   The apparent stars of the show are the A-shaped upper wishbone (green arrow) and the L-shaped lower wishbone (white). Miatas have used this layout from Day One, but aluminum didnÂ’t enter the picture until the NC generation.   For 2020, Bilstein monotube shocks (green) come on the Club and Grand Touring models with a manual transmission. This setup was part of the GT-S option package in 2019. The standard shocks are also monotubes, but theyÂ’re not Bilsteins and theyÂ’re tuned a bit softer. The upper control arm (yellow) is mounted low down such that its ball joint (white) resides within the barrel of the front wheel.