2010 Mazda Mx-5 Miata Sport Convertible 5-speed 30k Mi Texas Direct Auto on 2040-cars

Auto blog

Mazda Skyactiv-D racer first diesel to run at Indy in 60 years

While it may not be touting the old "Win on Sunday, sell on Monday" axiom we all know and love, Mazda recognizes that racing can only improve its cars. And so it's no surprise that the Japanese automaker is testing and refining its Skyactiv-D diesel engine by sending it out on various race tracks around the country - notably being the first diesel ever to compete at Daytona and the first to notch a Grand Am win at Road Atlanta.
Next up? Indy. It has been over 60 years since a diesel-powered machine ran at the Indianapolis Motor Speedway, and the Cummins-powered racer that competed in the 1952 Indy 500 with a 6.6-liter inline-six-cylinder oil-burner was a fast and brutal machine that set a new lap record in qualifying leading up to the race. Though that car was withdrawn with turbocharger failure 71 laps in, its diesel powerplant left an indelible impression on the racing community, and that's something Mazda hopes to accomplish once again.
Mazda says that the diesel engine in its race car is pretty darn close to stock - 51 percent stock by parts count, and 63 percent stock by weight - which means the way it performs in competition is at least a somewhat meaningful way to the stock engine's durability in the real world. Check out the image of the Mazda6 Skyactiv-D racer posing alongside the 1952 Cummins above (click to enlarge) and feel free to peruse the press release below for the rest of the details.

Mazda2 sedan images released ahead of Thailand reveal

Mazda will let customers put some junk in the trunk of its Mazda2 with the introduction of a new four-door model at the upcoming Thailand International Motor Expo on November 28. While the show is still days away from beginning, the Japanese automaker is already spilling some of the details about the sedan variant of its fetching subcompact. The four-door and traditional hatchback versions of the Mazda2 will both hit Thailand in early 2015. The two of them are essentially identical other than the added trunk and adjusted rear styling for the sedan. It basically makes the model look like a shrunken down version of the Mazda3 sedan, which isn't a bad thing at all. The company has big expectations for the little car because they're already Mazda's bestselling passenger models in Thailand. Both models will be sold with the SkyActiv-D 1.5 diesel in Thailand, which gives them lower taxes under the government's low-emission, compact car incentive plan. According to a previous rumor, a gasoline-fueled mill could join the lineup eventually, too. There's also gossip that the Mazda2 sedan could eventually be sold in Australia and Europe, but US sales are still a mystery. When asked about the four-door here, Mazda spokesperson Eric Booth told Autoblog, "We'll have more to say on Mazda2 at a later date. Right now, our focus is on the launches of the all-new CX-3 and MX-5 as well as the refreshed CX-5 and Mazda6." The company is showing all of those models at this week's Los Angeles Auto Show. Mazda to Debut the All-new Mazda2 Sedan at Thailand International Motor Expo - Goes on sale in Thailand alongside the hatchback model early 2015 - HIROSHIMA, Japan-Mazda Motor Corporation will debut the sedan model of the all-new Mazda2 (known as Mazda Demio in Japan) at the Thailand International Motor Expo 2014*1 on November 28, 2014. The all-new Mazda2 compact sedan features handsome proportions and bold styling, a high-quality, sporty interior and a combination of excellent driving performance and outstanding environmental and safety performance. The all-new Mazda2 hatchback will also be exhibited at the expo; the first time the model has been displayed to the public in Thailand. Both the sedan and the hatchback feature the SKYACTIV-D 1.5, Mazda's newly-developed small-displacement clean diesel engine. The all-new Mazda2 goes on sale in Thailand in early 2015.

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.