2004 Mazda Rx-8 Base Coupe 4-door 1.3l on 2040-cars

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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.

Mazda CX-5 getting mild refresh

Mazda has found both critical and commercial success with its CX-5 small crossover, and seems to be endeavoring to keep the momentum up with an upcoming refresh. As you can extrapolate from the obvious lack of the usual camouflage, the company isn't reinventing anything in the very near future of the CX-5, but it does seem as thought some tweaks are in the works.
Lighting elements fore and aft appear to have gone under the knife, with the front grille and rear fascia also seemingly to be slightly revised. The side mirrors now look slicker and slightly more upscale with their integrated turn signals, as well.
In all, expect a look that's a touch fresher, without being a radical departure from the existing visage.

2016 Mazda MX-5 Miata reveal to be livestreamed, feature Duran Duran

We're all hungry like the wolf to see the unveiling of the next-generation 2016 Mazda MX-5 Miata on September 3, but Mazda is seriously excited about taking the sheet of its latest droptop because it has 1980s New Wave act Duran Duran headlining the event. In case you can't make it to Monterey, CA, Tokyo or Barcelona to watch the reveal happen, the brand is also livestreaming it on YouTube starting at 6:00 PM PT (9:00 PM ET). The Miata is then showing its all-new face again during the broadcast of Fashion Rocks on CBS on September 9 at 9:00 PM ET.
Facts about the new MX-5 have remained elusive, but we saw its bare chassis at the 2014 New York show. The roadster was rumored to return to the classic oval grille from the earlier models and also shed a decent amount of weight over the current version, possibly around 300 pounds.
Don't worry about noting the big reveal in your calendars, though. Not only will Autoblog be in attendance in Monterey to hear Simon Le Bon belt out Rio, we will also publish another post linking to the livestream before the unveiling. In the meantime, scroll down to read Mazda's announcement and check out the link to the stream, which just shows a countdown at the moment.