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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:

2016 Mazda MX-5 Miata firsthand impressions and notebook scribblings

In a temporarily repurposed airport hanger in Monterey, CA, the world caught its first glimpse of the 2016 Mazda MX-5 Miata tonight, and I was fortunate enough to attend in person along with my fellow auto media colleagues, Mazda execs, a couple hundred Miata devotees and, oddly, a fair number of Duran Duran fans. The klieg lights have dimmed, Simon Le Bon is no longer ringing in my ears, and I'm left to ponder what I've seen. I've scavenged my notes - and my Twitter feed - to give you some details and brief thoughts.
Fair Warning: I can't claim to be completely impartial (I own a second-generation NB and consider the Miata franchise to be one of but a few sacrosanct franchises in modern motoring), but I will share my honest first impressions of the new car, both good and bad.
Here are my notes:

30th Anniversary Mazda MX-5 Miata sells out immediately

Remember back in 2014, when Mazda released the 25th Anniversary Mazda MX-5 Miata and it sold out in 10 minutes? Now, just hours ago at the Chicago Auto Show, Mazda opened the books for the 30th Anniversary model — and you guessed right, it's now sold out as well. This time around, it took four hours, but there's a difference: in 2014, there only were 100 25th Anniversary cars to pre-order, and for the big 3-0, Mazda allocated 500 U.S. cars. We're expecting the 2,500 rest-of-the-world cars will also sell out rather quickly. The 25th Anniversary model was Soul Red, but in the lighting seen in the 2014 article it rather reminds us of the "Sunkist" orange of the original NA generation Miata color test car, the orange one out of six one-off special paint cars. This year's model is more clearly orange, a hue Mazda calls "Racing Orange" and says it's inspired by the 1989 Club Racer concept's ... bright yellow. In any case, it's a good match with the ND's swoopy flanks. There is — we mean, was — a choice of regular Roadster from $34,995 and the folding top RF version from $37,995, and a choice of manual or automatic transmission. It took a refundable $500 deposit to secure one of the 500 cars. Chicago Auto Show Mazda