2004 Mazda Rx-8 Base Coupe 4-door 1.3l on 2040-cars

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Mazda6 Skyactiv-D Racecar ready to bring diesel to Grand-Am

It may not be quite as radical as some of the company's past rotary racers, but the new Mazda6 Skyactiv-D racecar does have a notable powertrain underhood: the automaker's brand-new clean diesel four-cylinder engine.
Three of these new diesel-powered Mazda6 racers will take to the track in the Grand-Am GX class of the upcoming 2013 Rolex 24 at Daytona on January 26, with five drivers on each team. The car you see above, number 70, is sponsored by Mazda's longtime motorsports partner, SpeedSource.
Check out our full gallery of high-res images live from the 2013 Detroit Auto Show above and feel free to read through the related press release from Mazda below.

2019 Mazda MX-5 Miata 30th Anniversary Edition goes bold

For a car with a mischievous grin and penchant for fun, the MX-5 Miata's color palette is on the drab side, but thankfully the 30th Anniversary Edition gets a vivid hue called Racing Orange. Mazda says it "evokes the breaking dawn of an exciting new day," and that it's partly inspired by the bright yellow of the Miata Club Racer concept from 1989. That's all well and good, but it looks to us more like the orange from the 1991 Le Mans-winning Mazda 787B race car. Whatever the reason, we dig the color. It will be important that the new owners like it, too, because the color is everywhere. It's on the brake calipers, door sills, air vents, stitching and piping. Everything else is a black or charcoal color, including the gorgeous Rays forged aluminum wheels, exclusive to this model, and the Alcantara trim on the dash, doors and seats. All versions of the special Miata come with Recaro seats, Brembo brakes, Bose sound system and Apple CarPlay and Android Auto. The manual models add a limited-slip differential, Bilstein shocks and a front shock tower brace. Mazda isn't making many of these special Miatas, with just 3,000 of the soft top and RF combined for the world. The U.S. will get only 500. Customers can order one now at a special configuration website, and they had better bring plenty of cash. The manual soft top starts at $35,915, and the manual RF starts at $38,515. Adding an automatic ups the price by $499 on the soft top and $400 on the RF. Related Video:

Tougher than steel: Wood pulp could make lighter auto parts

KYOTO, Japan — The global push among carmakers to make ever lighter vehicles is leading some auto suppliers in Japan to turn to what seems like an unlikely steel substitute — wood pulp. Japanese researchers and auto component makers say a material made from wood pulp weighs just one-fifth of steel and can be five times stronger. The material - cellulose nanofibers — could become a viable alternative to steel in the decades ahead, they say, although it faces competition from carbon-based materials, and remains a long way from being commercially viable.> Related: Jay Leno drives the Renew cannabis car — hemp you can't dent Reducing the weight of a vehicle will be critical as manufacturers move to bring electric cars into the mainstream. Batteries are an expensive but vital component, so a reduction in car weight will mean fewer batteries will be needed to power the vehicle, saving on costs. "Lightweighting is a constant issue for us," said Masanori Matsushiro, a project manager overseeing body design at Toyota. "But we also have to resolve the issue of high manufacturing costs before we see an increased use of new, lighter-weight materials in mass-volume cars."A NEW PROCESS Researchers at Kyoto University and major parts suppliers such as Denso Corp, Toyota's biggest supplier, and DaikyoNishikawa Corp, are working with plastics incorporated with cellulose nanofibers — made by breaking down wood pulp fibers into several hundredths of a micron (one thousandth of a millimeter). Cellulose nanofibers have been used in a variety of products ranging from ink to transparent displays, but their potential use in cars has been enabled by the "Kyoto Process," under which chemically treated wood fibers are kneaded into plastics while simultaneously being broken down into nanofibers, slashing the cost of production to roughly one-fifth that of other processes. "This is the lowest-cost, highest-performance application for cellulose nanofibers, and that's why we're focusing on its use in auto and aircraft parts," Kyoto University Professor Hiroaki Yano, who is leading the research, told Reuters in an interview. The university, along with auto parts suppliers, are currently developing a prototype car using cellulose nanofiber-based parts to be completed in 2020.