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How Mazda got Skyactiv-X to work is incredible

"Take everything you know about engines and turn it around," Mazda North America Vehicle Development Engineer Dave Coleman says, patiently and with a look of benevolent pity, as he's quizzed about the particulars of the company's new engine. The Skyactiv-X engine is enigmatic — and deceptively simple in operation. And the bottom line for American consumers is that they'll be able to buy a car (or crossover; we don't know yet what vehicle will first get it) by late 2019 that provides diesel-like fuel economy but runs on regular old gasoline. In between diesel and spark ignition, but it's neither To truly understand it, you have to dive into the contradictions. Take that regular old gasoline: Contrary to common sense, the lower the octane, the better it works. In the lab, the Skyactiv-X engine loves 80 octane. The lowest Americans get is 87, so the engine is tuned for that octane. Go higher and you lose some low-end torque. Coleman was right. It's hard to wrap your head around an engine that thrives just at the point when most gas engines would aggressively self-destruct. It uses a supercharger to pump additional air — but not additional fuel. It uses spark plugs to start a combustion cycle that normally doesn't need a spark. And, quixotically, it's not displacing Mazda's own American-market diesel engine, currently languishing in a seemingly endless hell of regulatory approval. More bizarre: Mazda is a tiny automaker facing real existential headwinds, and gasoline compression ignition is a massive challenge. GM and Hyundai announced compression ignition, or HCCI, projects (full name, homogeneous charge compression ignition) to great fanfare, but they never amounted to a production hill of beans, crippled by reliability issues or horrible vibrations. Worse, they only worked at an unusably narrow range — low RPMs and low loads. HCCI research improved direct-injection gas and diesel engine technologies for these companies, but HCCI itself remains untamed. The benefits of lean combustion Why even try to tame HCCI? The answer is much better fuel economy and lower emissions. Less burned carbon-based fuel, less carbon dioxide released. That's simple. But there are some thermodynamic reasons for the lean combustion you can achieve with compression ignition that are worth explaining. The ideal amount of fuel for a conventional engine to burn is about a 14:1 air-to-fuel ratio. That lets every molecule burn nicely, in theory.

Road & Track to take Miata on million-mile march

Road & Track has taken on a Miata project. One hell of a project, if we're honest. You see, the Miata in question, a 1989 example in Mariner Blue, isn't a high-mileage Mazda that the publication intends to fix up, or make race-worthy, or try to flip or give away to a reader or something. No, it's a rather typical well-used NA, with a hefty 325,000 miles on the clock to-date that the staff plans on driving until the six-digit odo reads all zeros again. One million miles or bust (or both, most likely).
Procured for the bargain-basement price of $1,600, complete with seat covers that "really do look like muppet pelts" (according to Zach Bowman) and a bondo-filled love tap on the nose, the NA Miata actually looks like just the sort of fun-machine that a real driving enthusiast would pick up to get some cheap thrills in. The R&T team already has some interesting plans for the Miata, including a potential run up Pikes Peak and loaning it out to readers (or perhaps your author...). Click through to read all about it.

The 2016 Mazda MX-5 Miata Has Arrived

Ladies and gentlemen, meet the 2016 Mazda MX-5 Miata. The highly anticipated fourth-generation (ND) model made its official debut in Monterey, CA this evening, and while details are slim (as in, we have practically none), there's one big thing to talk about: less weight. Yes, Mazda has confirmed that the new Miata sheds some 220 pounds over the model it replaces, and is "the most compact of any generation MX-5 so far." For those keeping track, that means the new MX-5 should weigh in somewhere around 2,200 pounds. Mazda's Kodo design language is obvious here, with a seriously wide and low demeanor, and a mix of flowing lines and sharp angles. We don't have any powertrain details to report as of this writing, but Mazda says the full suite of Skyactiv technologies are onboard, and the motto in creating this car was "Innovate in order to preserve." Click the image above to see the new MX-5 Miata in high resolution, click below for the press release, and stay tuned to this space for more details as they break. UPDATE: Want more Miata details? Please check out our in-depth firsthand report from the Miata's reveal event by clicking here and see the first-ever rolling footage of the car in our brief video here. Mazda Unveils All-New Mazda MX-5 HIROSHIMA, Japan-Mazda Motor Corporation today celebrated the unveiling of the fourth generation Mazda MX-5 (known as Roadster in Japan) together with fans at events held simultaneously in Japan, USA and Spain. The all-new MX-5, which adopts both SKYACTIV TECHNOLOGY and Mazda's KODO-Soul of Motion design language, will be rolled out to global markets starting in 2015. The MX-5 is an iconic model representing Mazda's vehicle-engineering philosophy-the pursuit of driving pleasure. "Innovate in order to preserve" was the motto for the fourth generation, as the development team searched for innovations that go beyond simple evolution. Environmental and safety demands are much more stringent than they were when the first generation MX-5 was introduced 25 years ago, but the fourth generation stays true to the model's original aim of offering the pure driving fun that only a lightweight sports car can. It achieves this through the adoption of SKYACTIV TECHNOLOGY and refinement of its appeal to the senses and sensations through which people enjoy cars. The design of the all-new MX-5 reveals another layer to Mazda's KODO design language.