2011 Mazda 3 Great Condition! on 2040-cars

Auto blog

Mazda Skyactiv-X Review | The revolution begins with a squeeze-bang

The matte black Skyactiv-X prototype looks like a rough Mazda3, perhaps reconstructed after a bad wreck by an over-enthusiastic owner of a spot welder and lots of gaffers' tape. Ribbed ducts poke out of the dash sending two breaths of conditioned air to no one in particular. Even its revolutionary engine, the thing we're here to experience, is entombed in a massive, nondescript cover to mask its unseemly noises. It's a wild, strange way to meet a very unconventional vehicle that promises diesel-like fuel economy, a wide torque band, and an exotic method for burning less gas than ever before. It takes a few hours for Mazda's engineers to explain the fundamental principles of operation. For more detail, read our Skyactiv-X Spark Controlled Compression Ignition explainer, but here's a very brief overview. Skyactiv-X marries some traditional gasoline engine characteristics with a novel form of compression ignition called SPCCI. The key for Skyactiv-X is to use very high compression in the cylinder and an extremely lean fuel-air mixture. Squeezed right to the cusp of getting hot enough to blow up all on its own (which is very hard to predict), a squirt of extra gas and a spark interject to cross that compression-ignition threshold in a controlled and predictable manner. See the animation below: That takes a few essential components to get just right. One is a massive amount of computer processing power and some pressure sensors in the individual cylinders, because the ambient conditions change how and when these things happen. Skyactiv-X uses a clutched supercharger to pump in additional air when needed to nail the mixture precisely, and high-pressure injectors to get the low ratios of fuel to disperse properly in the chamber. And since it operates like a conventional gasoline engine sometimes, it uses valve timing to lower the very high compression ratio so it doesn't reach combustion ignition in that mode. In practice, the Skyactiv-X runs in compression ignition mode most of the time. In practical terms, that means it drives like a torquey gasoline Skyactiv engine. The torque curve is broad and flat — diesel-like in that respect. That also means it can get away with using a six-speed transmission and a lower final drive for better response. There's enough grunt and economy together that Mazda can let the engine spin faster — at 60 mph, it's running at roughly 1,000 more RPM than a similar gas engine, with greater efficiency.

Mazda hits Vegas with a pair of Sixes

Despite the fact that the annual SEMA show is more of an exercise in what "could be" than what "will be," it gives automakers the chance to stretch the legs of some of its most important models. Take the 2014 Mazda6, for example - it's hardly new, having gone on sale early this year - but this year's SEMA expo marks the first time Mazda has been able to show off the customization possibilities for its sleek midsize sedan. To that end, the Japanese automaker has arrived in Las Vegas with two very different takes on its sexy Six.
First up is the Mazda6 Club Sport you see above, wearing a "motorsports-inspired" gray, black and red accent-color scheme that, as Mazda says, is "represented in not-so-subtle angular lines reminiscent of a car speeding past your line of sight." The whole car is done up in a base color of Composite Grey, and uses a Brilliant Black roof to match the similarly colored front, side and rear diffusers, as well as the rear spoiler. Mazda has fitted the Club Sport with Rays 57 Motorsport G07FXX 20-inch wheels, wrapped in Yokohama 245/35R20 tires. Powering the CS is Mazda's 2.2-liter Skyactiv-D diesel four-cylinder engine (that we'll get in the standard Six early next year), and other changes include an H&R spring kit, larger Brembo brakes and a Racing Beat exhaust.
And then there's the Ceramic 6 Concept, pictured right. The name comes from the car's Ceramic White paint, though we don't really get the Taupe Silver accent stripes. Mazda says they're meant to mimic "the linear frequency patterns found on the likes of couture dresses and flowing fabrics," but it just looks a bit overwrought to us. The Mazda6 already has so many clean lines, why add more?

Mazda Miata 'fathers' Hall and Case offer a tour through the roadster's history

The original Mazda Miata broke onto the automotive scene in 1989 and was a huge success. However, the convertible's genesis goes all the way back to the early '80s. Bob Hall and Dean Case were among the inside men of the program on the US side, and they were on hand at Mazda Raceway Laguna Seca during the recent MX-5 event there to tell some of their stories about the project's beginning.
Hall was on the Miata project from very early on, and one of his most fascinating stories is how the convertible got its shape. The droptop wasn't necessarily going to be a rear-wheel drive roadster. There were both front-wheel-drive coupe and mid-engine concepts being considered. In fact, the classic look of the NA generation was the least favorite of the three at the sketch stage.
Hall comes off as a jokester hiding a genius mind. He has a fountain of information in his head about what a Miata should be, but it all comes down to "less is more." However, he admits that it's easy to conceive that idea, but it's much harder to actually execute it well.