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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:

Cars with the most reckless drivers are full of surprises

Insurify is a site for comparing auto insurance quotes. Because insurance shoppers need to submit information like the vehicles they're driving and the infractions they've compiled while driving those vehicles, Insurify has quite the database of correlations tying certain models to a habit of breaking certain laws. When the site's data analysts decided to compile a list of the top ten models for reckless driving citations in the decade from 2010 to 2019, the ranking contained a few wild entries. The Dodge Challenger making the countdown will surprise precisely zero people. But the Saturn L200? First, a definition: USLegal.com defines reckless driving as "driving with a willful or wanton disregard for safety. It is the operation of an automobile under such circumstances and in such a manner as to show a willful or reckless disregard of consequences." So this list is a caution about particular drivers more than the cars. For a baseline, according to Insurify data, for any random model, 15 out of 10,000 people who drive that model have picked up one citation for reckless driving. Back to that Challenger, then. No shocker for being here, but it's actually number 10, with 44 out of 10,000 Challenger drivers nabbed for a willful disregard of consequences on the road. That's better than the first surprise entry, the Saturn L200, a sedan only on sale for six years, with the least horsepower on the list, and out of production since 2005. The data set put drivers of GM's extraterrestrial sedan at 45 reckless pilots per 10,000 drivers. There are two pickups on the list, the only modern one being the Ram 1500 at eighth, with a rate of 46 in 10,000. Somehow, drivers of the third-best-selling pickup in the U.S. outrun the overwhelming numerical superiority of the best-selling vehicle in the States, the Ford F-150. The other pickup is the Chevrolet K1500 at number five, with a rate of 56 in 10,000. This is not only the oldest vehicle on the list, it went out of production in 2002, before any other vehicle on the list. Between the trucks, the Volkswagen CC slotted in at seven with 47 in 10,000 reckless driving chits, the Cadillac ATS slipped into sixth with 48 in 10,000.  The top four is a bag of unexpected. The Nissan 370Z is the first hardcore sports car on the list at number four, with 61 in 10,000 Z drivers flaunting their Fairladys in the face of Johnny Law.

Mazda Miata 'fathers' Hall and Case offer a tour through the roadster's history

The original Mazda Miata broke onto the automotive scene in 1989 and was a huge success. However, the convertible's genesis goes all the way back to the early '80s. Bob Hall and Dean Case were among the inside men of the program on the US side, and they were on hand at Mazda Raceway Laguna Seca during the recent MX-5 event there to tell some of their stories about the project's beginning.
Hall was on the Miata project from very early on, and one of his most fascinating stories is how the convertible got its shape. The droptop wasn't necessarily going to be a rear-wheel drive roadster. There were both front-wheel-drive coupe and mid-engine concepts being considered. In fact, the classic look of the NA generation was the least favorite of the three at the sketch stage.
Hall comes off as a jokester hiding a genius mind. He has a fountain of information in his head about what a Miata should be, but it all comes down to "less is more." However, he admits that it's easy to conceive that idea, but it's much harder to actually execute it well.