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Mazda's next-gen SkyActiv engines will drop spark plugs in favor of high compression

Homogeneous charge compression ignition, or HCCI, is the black art of internal combustion engines that aims to produce diesel-like fuel efficiency for the cost of gasoline. Although some of its competitors have developed and subsequently given up on the tech, Mazda confirmed that the next-generation of SkyActiv engines will employ HCCI technology, improving fuel economy by 30 percent and at the same time reducing exhaust emissions. According to Nikkei, a new SkyActiv family of engines is set to debut under the hood of the next-gen Mazda3 sometime in 2018 before making its way into other vehicles. In simple terms, an engine that uses HCCI burns the air/fuel mix using pressure instead of with spark plugs, just like a diesel. At 14:1, Mazda's gasoline engines already have some of the highest compression ratios out there, but a move to HCCI means cranking up the compression to 18:1. While the tech sounds relatively straightforward, using HCCI means dealing with a number of side issues. It's one of those "on paper" ideas that compounds problems when put into practice. Heat, revs, and fuel must all be carefully managed as gasoline doesn't burn the same way as diesel. Mazda is mum on details, but the automaker seems confident that the issues have been sorted. If the new engines do indeed make it to market with HCCI, Mazda will have out-engineered GM, Daimler, and Hyundai, all of which have tried and failed to develop HCCI engines in a cost-effective package. With the market moving towards electrification, it's interesting to see Mazda still focusing so heavily on traditional internal combustion gasoline engines. It's an indication of where they see the market heading for the next few years. Although the automaker has been hesitant to move forward with hybrid and electric powertrains, Nikkei also reports that Mazda will begin mass production of EVs in 2019. Related Video:

Jay Leno celebrates Mazda Miata's 25th birthday

Ask a car enthusiast what the best driver's car on the road is, and the Mazda MX-5 Miata is very likely to come up rather quickly. Unjustly saddled with a reputation as a "chick's car," the Miata has been, over its three generations, one of the finest driving instruments ever built - it's light, agile and rear-wheel drive with direct, snappy steering, an engine that revels in being revved and a precise, smooth-shifting transmission. The fact that it's ridiculously affordable and reliable is simply a bonus.
It should come as no surprise then, that a car with these traits has endured for 25 years, a milestone reached only by some of the most famous nameplates in the auto industry - Corvette, Mustang, F-150, SL, M3 and so on. To celebrate its 25th anniversary, Jay Leno spent some time with the little roadster that could, while also chatting with two of the Mazda employees that were central to the MX-5's arrival on the world's automotive scene, Bob Hall and Tom Matano.
Take a look below for the latest video from Jay Leno's Garage on the excellent Mazda MX-5 Miata.

Buy a Fiat 124 Spider Abarth, get a free day of driving school

We know the Mazda MX-5 Miata and the Fiat 124 Spider are basically the same car underneath. As we pointed out in our first drive of the 124 Spider, the two cater to different drivers, so it can be tough to choose a favorite. FCA has made deciding between the two sports cars a little harder, as it will offer Abarth owners a free day of high-performance driving instruction with their cars. Anyone buying or leasing a new Fiat 124 Spider Abarth or a Fiat 500 Abarth will get a free, one-day class at the Bob Bondurant School of High Performance Driving in Phoenix. Bundling driving school with brand-new performance cars isn't unheard of – Dodge and Bondurant recently announced a similar program for the Viper – but it is quite rare for vehicles priced below $30,000. The free session will include instructor-led skid, autocross, slalom, and team rally cross activities, in addition to hot laps. While the one-day course is included for free, travel, food, and hotel expenses aren't covered. Fiat-less people can also join in on the fun buy purchasing the Abarth experience separately. Bondurant one-day classes cost at least a grand, which makes the Fiat price of $0 a good deal as long as you can get yourself there relatively cheaply. But is this enough for drivers to choose the 124 Spider Abarth over an MX-5 Club? This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. Related Video: Featured Gallery Bob Bondurant Fiat 124 Spider Abarth Related Gallery 2017 Fiat 124 Spider: First Drive View 30 Photos News Source: FCAImage Credit: FCA Fiat Mazda Convertible Performance fiat 124 spider abarth