2004 Mazda 3 I Sedan 2.0l 129k Miles 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 CEO says rotary not viable, so don't look for a new one

We have some very sad news to report, rotor-heads fans: Don't expect a new rotary-powered vehicle anytime soon. This comes straight from Masamichi Kogai, the CEO of Mazda, which is the only company to ever market a commercially successful rotary-powered automobile in the world. The issue, as it has pretty much always been, is environmental.
While the Wankel rotary engine does indeed make a lot of power in a small, lightweight package, it does so while burning lots of fuel and emitting lots of noxious gases into the atmosphere, at least when running on gasoline. And that means the rotary engine will likely only ever be able to power niche vehicles. And that, in turn, means that it is very difficult to turn a profit on vehicles with rotary engines, particularly for a small automaker like Mazda.
"It has to be a viable commercial proposition. If we are going to adopt it, it has to be a product that can generate at least sales of 100,000 units a year. We have to be able to achieve a profit," said Kogai in an interview with Automotive News. Mazda sold 56,203 RX-7 models in the United States (the automaker's biggest market) in 1986. Sales of the RX-8 peaked in 2004, its first full year on the market, with just 23,690 units.

Car Club USA: Miatas at Mazda Raceway Laguna Seca

The Mazda MX-5 Miata is a very popular car for weekend warriors looking for the thrill of automotive racing in an affordable package. These iconic, rear-wheel-drive roadsters are lauded by enthusiasts for their driving dynamics, reasonable price, and plethora of available parts. That's why the annual Miatas at Mazda Raceway Laguna Seca track event draws such a diverse cross section of drivers from allover the country. But, still, some types of drivers are more well-represented than others. "I usually am the only female signed up for the high-performance driving," said Carolyn Kulaja of Gila Monster Racing. "The car doesn't care the gender of the person driving." For Carolyn, racing Miatas is a passion that developed later in life, but she's not slowing down anytime soon. "My first racecar was car number 57, which was my age when I started racing," said Carolyn. "The 88 I decided was going to be my age when I quit racing." Young competitor Kyle Koh of Infotech Motorsports has his own reasons for racing. "Driving has changed my life in a major way," said Kyle. "It took me out of a depression." Kyle's first competitive fire was directed toward football, but after breaking his back during his sophomore year of high school, he had to find another outlet. "Kyle came to me one day and he decided that he wanted a project car," explained Kyle's father and racing partner Larry Koh. "Because the Miata community is so friendly to begin with, it becomes a big family." How will Carolyn and Kyle fare through Laguna Seca's infamous corkscrew? Find out on this episode of Car Club USA. Each Car Club USA episode features a different car club or event from across the US, where passionate owner communities gather to share automotive experiences and embark on incredible adventures. From Main Street cruises to off-road trails, catch all the latest car club activity on Autoblog.