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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.

More powerful 2019 Mazda MX-5 also more efficient

Bumping the 2019 Mazda MX-5 Miata's power from 155 horses to 181, plus little interior upgrades such as a telescoping steering wheel were more than enough to make the appealing roadster even more so. But there's yet another bonus in store for those that pick up the new Mazda: more efficiency. As initially spotted by industry watcher Bozi Tatarevic, the EPA released fuel economy numbers for the new model, and they're better than the 2018's. And between the automatic and manual versions, the manual sees the biggest increase. Now, these are, very, very minor increases in EPA fuel economy, but any increase is welcome when nothing is lost. The automatic continues to be the most efficient. While the city and highway ratings are unchanged at 26 and 35 mpg respectively, the combined rating increases by 1 mile per gallon to 30. The manual transmission model isn't far behind. City mileage stays the same at 26 mpg, as does the combined rating of 29 mpg. However, highway fuel economy picks up 1 mpg for a total of 34. So to recap, the 2019 Miata retains its good looks, and likely its playful handling and snickety shifter. But it also gets more power, better fuel economy, a better interior, and more options to customize than ever before. This is sounding like it could be the best Miata, yet. We can't wait to try it out. Related Video: Mazda Convertible Performance

Toyota, Mazda get an Alabama welcome for $1.6 billion plant

MONTGOMERY, Ala. — Toyota and Mazda confirmed Wednesday they will build a $1.6 billion joint venture assembly plant in Alabama that will employ up to 4,000 workers, a boost for President Donald Trump who wants automakers to expand U.S. production. Toyota President Akio Toyoda and Mazda President and Chief Executive Officer Masamichi Kogai joined Alabama Gov. Kay Ivey in Montgomery at an event to confirm the decision. "Welcome to sweet home Alabama," Ivey said to the two executives, after saying that the anticipated 4,000 workers at the plant to be built in Huntsville would earn an average of $50,000 a year. The plant will produce 300,000 vehicles a year and should open on a 2,500-acre former cotton field in 2021, about 14 miles from Toyota's engine plant in Huntsville. Toyota plans to build Corolla cars at the plant, while Mazda will build crossover SUVs. "Together, I am confident we will create yet another 'Built in America' success story," Toyoda said. Alabama will provide tax incentives. Officials said the state tax incentives were worth $370 million, but they did not disclose how much the local incentives were worth. Huntsville Mayor Tommy Battle said the plant will "provide jobs for decades to come for Huntsville and Alabama. It vaults Alabama to the top as an industry leader in producing the next generation of cars that will power our nation." Among U.S. states, Alabama is already the fifth largest producer of cars and light trucks. The state has more than 150 major auto suppliers and 57,000 automotive manufacturing jobs. Two decades ago, Alabama spent an estimated $250 million to woo Daimler AG's Mercedes-Benz to put an auto plant in Tuscaloosa, sparking the birth of auto production in the state. In September, Daimler said it would invest $1 billion to expand its Alabama Mercedes-Benz plant to start building electric sport-utility vehicles there from about 2020. Alabama is also home to assembly plants operated by Honda and Hyundai. A Kia assembly plant operates near the Alabama border in Georgia. Mazda and Toyota said they still need approvals and authorization by antitrust agencies for the new joint venture. They announced a capital alliance in August and plans to jointly develop technology for electric vehicles. Trump tweeted in March he wanted "new plants to be built here for cars sold here." Many automakers have announced expansions of facilities or new jobs but no other new U.S. auto plants have been announced. U.S.