2003 Mazda Miata Mx-5 One Owner 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.

2020 Mazda6 starts at $24,920, $200 more than 2019 model year

Mazda increased the price of all five trims of the 2020 Mazda6 by $200. The entry-level Mazda6 Sport starts at $24,000 before $920 destination charge ($965 in Alaska), for a total of $24,920. The only changes for next year are a new key fob likely copying the black and shiny metal unit from the Mazda3, and a new Signature badge likely in the form of the elemental "Sg" pulled from the CX-5 Signature model. The three Premium Paint choices carry over, with the same prices: Snowflake White Pearl Mica for $200, Machine Gray Metallic for $300, and Soul Red Crystal Metallic for $595. Prices of the other four trims run:  Mazda6 Touring $27,580 Mazda6 Grand Touring $30,620 Mazda6 Grand Touring Reserve $33,120 Mazda6 Signature $36,220 We're awaiting word on the arrival of all-wheel drive and the 2.2.-liter turbodiesel fitted to the CX-5. In the CX-5, that engine makes 168 horsepower and 290 pound-feet of torque. An AWD Mazda6 showed up in paperwork filed with the National Highway Traffic Safety Administration in January 2018, spy shots of a diesel-powered sedan followed in May that year, and Mazda mentioned the oil-burner again in April this year. For the time being, power for the 2020 Mazda6 will continue to be sent to the front axle through a six-speed automatic — Mazda eliminated the six-speed manual for the 2019 model year. The Sport and Touring trims come with a 2.5-liter four-cylinder that makes 187 hp and 186 lb-ft. The Grand Touring, Grand Touring Reserve and Signature raise that to a turbocharged 2.5-liter four-cylinder with 227 hp on 87 octane gas, or 250 hp on 93 octane, and 310 lb-ft.

2016 Mazda MX-5 Miata configurator fulfills your droptop dreams

The first batch of 2016 Mazda MX-5 Miatas are already at dealers, but Mazda is finally launching a configurator for its completely revised sports car. Even if pricing doesn't come as a surprise, you can still have some fun creating one to your own specific tastes. The major equipment changes on the Miata happen between the Sport, Club, and Grand Touring trims, and options are generally kept light. The real standout is the Brembo/BBS package for $3,400 that's exclusive to the Club version. It adds Gunmetal 17-inch BBS wheels, Brembo front brakes with red calipers, side sill extensions, a rear bumper skirt, and keyless entry. On the Sport and Grand Touring, $1,200 buys the Appearance Package with a front air dam, side sill extensions and rear bumper skirt. There's also keyless tech for $130 on them. Mazda also offers a few items to dress up the convertible's looks. There's a choice of a black or body color rear lip spoiler for $350, and Soul Red Metallic paint adds $300. For protection, clear film for the front and rear paint is $125, all-weather floor mats go for $90, and wheel locks cost $55. Finally, a cargo net is $50. We ticked every applicable box on the Club trim above to make its $28,600 base price leap to $33,790, after the $820 destination charge on all models. Happy building. Related Video: