2002 Mazda Protege Lx Sedan 4-door 2.0l 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.

These are the cars being discontinued for 2024 and beyond

While we get new and updated car models every year, its inevitable that we'll need to say goodbye to some nameplates as well. This time around, it feels like we have confirmation or reports of an unusually large number of vehicles being discontinued in 2024 and the coming years.  We shouldn't be surprised. A large number of automakers are approaching their various target dates for electrification of their fleets. As such, some beloved internal combustion cars are going away, sometimes with appropriate fanfare like special editions. Others are slinking away quietly, killed by slowing sales and changing consumer trends. Of course, the end of production doesn't necessarily mean permanent death. Some of these models could be resurrected in later years ... and probably as an EV. With that in mind, here are the vehicles that are being discontinued in 2024 and beyond.   Alfa Romeo Giulia Quadrifoglio and Stelvio Quadrifoglio Alfa Romeo ended the production of its combustion-only Quadrifoglio models in April 2024 as the Italian automaker moves toward an electrified future. This isn't the end of the Quadrifoglio entirely, though, with Larry Dominique, Alfa Romeo senior vice president and head of North America, writing, "I look forward to presenting the next chapter in the four-leaf clover’s journey."   Chevrolet Camaro GM is ending production of the Chevy Camaro after 2024, but is sending it off in style with a CollectorÂ’s Edition. WouldnÂ’t it be cool, though, if Chevy brought it back as an EV?   Chevrolet Malibu Rumors of its demise have been around for a while, but now itÂ’s official. GM will end production of the Chevy Malibu in November of 2024. The assembly line in Kansas will be retooled to build the replacement for the Chevy Bolt.   Dodge Durango The three-row Durango is slated to be replaced by the Stealth nameplate after 2024. The Durango name could make a comeback later, according to rumors, on a body-on frame SUV based on the Jeep WagoneerÂ’s platform.   Ford Edge This is the last year for the Edge in the U.S., with the final unit rolling off the assembly line in April. On sale since 2007, the Edge topped 100,000 sales in all but three full years of production.   Ford Escape Newly refreshed for the 2023 model year, FordÂ’s popular Escape compact SUV is reportedly taking its leave in 2025 in order to usher in — you guessed it — an EV in its place.

Mazda struggles to meet demand on rising sales

For Mazda there's good and not-so-good news on the heels of strong US sales in 2012: demand is high - especially for the Mazda3, Mazda6 and CX-5 - but supply is low, TheDetroitBureau.com reports. That's partly because all Mazda production happens in Japan, since it ended its alliance with Ford and pulled out of a joint venture with the blue oval building cars in suburban Detroit last year.
In 2012, Mazda sales here jumped 26.4 percent, but 2013 sales through August have just been keeping pace with the overall US auto industry, increasing at a rate of 6.8 percent. Mazda North American Operations director of marketing and communications Jeremy Barnes says that sales have slowed because the company is facing challenges delivering products here.