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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.

Chicago Auto Show: The really big reveals from shows past

The 2024 Chicago Auto Show may seem like a shell of its former self, but it still holds the title of the largest consumer auto show in the United States. It didn't get that reputation simply by being efficiently produced or convenient for locals desperate for something to do in February — it earned it over decades of breaking automotive news and powerhouse reveals, eventually earning an informal designation as America's truck show.  2024 may be a down year for Chicago, but let's not forget all of the great things that have come out of it, historically. Here's a look at some of our staff favorites. Bet you didn't know about a few of these cars that were first revealed in the Windy City.    2008 Dodge Challenger SRT-8  I didn't just pick this one as a former Challenger owner, but instead to illustrate just how many cool Chicago debuts we take for granted. Chrysler often chose its home turf to debut new cars, so the few times its unveilings happened elsewhere tend to stick in our minds. The first Challenger SRT-8 was kind of garbage, if we're being honest. I mean, who buys a race-bred, V8-powered muscle car without a limited-slip differential? But the SRT-8 formula evolved over time into something truly special, and what we saw in Chicago was essentially the early version of the Scat Pack, which was ultimately very successful for Dodge. And who would have thought we'd be here, 15 years later, still talking about that debut? And still loving these big Mopars, flaws and all. — Associate Editor Byron Hurd SHO time in Chicago IÂ’ll always have a certain fondness for the return of the Taurus SHO at the 2009 Chicago Auto Show. Chicago has always leaned truck and van heavy for press reveals, but every now and then, as this list illustrates, something spicy would appear. The return of the SHO as a high-powered successor to the original that ran from 1989-1999 gave enthusiasts hope for FordÂ’s performance business, especially for sedans. With a 3.5-liter EcoBoost V6 packing 365 hp, all-wheel drive and five-spoke wheels, the SHO was a nice upgrade from the lower-rung Taurus models. It was a bit more sedate than the original SHOÂ’s Yamaha-sourced V6 that teamed with a five-speed manual transmission, but still a worthy response to the Chrysler 300, Dodge Charger and later the Chevy SS. The SHO — Super High Output — begat things like the Fusion ST and gave Ford solid four-door performance for the rest of the decade.

The 2020 Mazda CX-30 will start at $22,945 with 2.5L power

We saw the CX-30 debut in Geneva earlier this year, and now Mazda has made its U.S. specification and pricing official. To get right down to it, the new crossover that splits the small end of the company’s crossover lineup will start at $22,945. We also have some solid information about spec and trim levels for our market, with some notable differences to how it can be equipped in Europe in particular. For one, like the latest Mazda3, it can only be equipped with a 186 horsepower 2.5-liter engine (naturally-aspirated, to be clear). Europeans can get a range of engines, and our neighbors in Canada and Mexico can get a 2.0-liter gas engine. A six-speed automatic is similarly our only transmission choice. All trims are available with front- or all-wheel drive. No word on whether the (somewhat underwhelming) Skyactiv-D diesel or (rather incredible) Skyactiv-X compression-ignition engines will be available. The materials Mazda provided us ahead of the CX-30Â’s U.S. debut focus heavily on the vehicleÂ’s standard equipment, including the now standard Mazda Connected Services — offering a variety of remote functionality and monitoring via the MyMazda app. Nothing you wouldnÂ’t expect from this sort of connectivity feature, including remote start and lock/unlock, as well as a WiFi hotspot (via Verizon, which is the parent company of Autoblog) and emergency assistance calls. Note that itÂ’s a three-year free trial; after that it becomes a subscription service, with a price weÂ’ll share with you once we learn it. There are four trims for the CX-30. The base model has some decent standard equipment: an 8.8-inch infotainment display, automatic headlights and the standard i-Activsense safety suite including driver inattention alert, radar cruiser control, lane departure warning with lane keeping assist, emergency braking assist and automatic high beams. Notably, blind spot monitoring is not available in the base model; buyers will have to step up to the next trim, Select, to get that safety feature. WeÂ’re disappointed that itÂ’s not standard across the board. So too with Apple CarPlay and Android Auto, also only available on Select and above. The Select trim is $24,945, and provides those features mentioned above as well as leatherette seats, keyless entry and 18-inch wheels. The Preferred trim ($27,245) provides upgraded audio, heated front seats, a power driver seat, a black gloss grille and a SiriusXM trial.