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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:

Jeremy Clarkson chooses his top 10 cars for 2015 and 2016

Jeremy Clarkson is well-known for his role as co-host on the old Top Gear. But the frontman of the upcoming Amazon Prime Show, The Grand Tour, also has a standing column for The Sunday Times in the UK where he reviews the latest cars. With fall nearing, Clarkson put out a list of his top-10 cars from this year and 2015. Some on the list will surprise you, while others represent everything we've come to love about Clarkson. In order to make his list of star cars, the vehicles must offer what co-host James May calls "the fizz." The vehicles, Clarkson claims, have something that is out of the ordinary. Whether it's the car's looks, the way it gets up to speed, or its high-tech gadgets, Clarkson's top-10 list is made up of items that are more than just tools for getting from point A to B. So which ones made the list? Head over to the column in The Sunday Times. Mazda MX-5 Miata 2.0 Sport Recaro Alfa Romeo 4C Coupe Mercedes-AMG GT S Ford Focus RS Ford Mustang Fastback 5.0 V8 GT Volvo XC90 D5 AWD Vauxhall Zafira Tourer 1.6 CDTi Tech Line BMW M2 Ferrari 488 GTB Lamborghini Aventador Related Video: Featured Gallery Jeremy Clarkson's Star Cars For 2015 and 2016 View 11 Photos News Source: The Sunday TimesImage Credit: STEFAN HEUNIS / AFP / Getty Images Celebrities BMW Ferrari Ford Lamborghini Mazda Performance bmw m2 ferrari 488 gtb

Mazda halts sales of CX-5 due to fire risk in crashes

The Basics: Mazda will recall 264,463 examples of the 2014-2016 Mazda CX-5 in the US. The Problem: The fuel filler pipe can rupture in a rear collision. This could cause a fuel leak, which is a fire risk. Injuries/Deaths: None reported. There are also no reports of fires. The Fix: Mazda has not yet specified the repair for the problem. If You Own One: Concerned owners can get a free loaner, demo, or rental vehicle until Mazda dealers repair the vehicle. More Information: Mazda also has a stop sale on new examples of the CX-5 until the company fixes the problem. Related Video: Mazda Implements Recall and Stop Sale of All 2014-2016 MY CX-5 Vehicles WASHINGTON, DC (February 1, 2016) – Today, Mazda Motor Corporation filed a safety defect report with the National Highway Traffic Safety Administration (NHTSA) to address a concern with 2014-2016 Model Year (MY) CX-5 vehicles. On all 2014-2016 MY CX-5 vehicles, the fuel filler pipe could rupture during a rear collision, and could potentially cause fuel leakage. Approximately 264,463 vehicles are affected in the U.S. There are no reports of accidents or injuries occurring in the subject vehicles as a result of this condition. If a customer has concerns about driving their vehicle before the repair is available, dealers will offer a free loaner, demo, or rental vehicle. Mazda North American Operations is headquartered in Irvine, Calif., and oversees the sales, marketing, parts and customer service support of Mazda vehicles in the United States and Mexico through more than 700 dealers. Operations in Mexico are managed by Mazda Motor de Mexico in Mexico City.