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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.

Mazda3 sedan revealed by Top Gear Russia [w/poll]

Thanks to our comrades at Top Gear Russia, the trickling reveal of the Mazda3 sedan has begun. We saw the hatch in person in New York (and loved it), and we wanted to see if the trunked version could hold onto the same mojo. If you like the Mazda6, then you should like the Mazda3 because it takes just about everything from its toothsome big brother and shrinks it into a compact package.
Top Gear Russia was allowed to share photographs of the Mazda sedan they call "Treshka" (or they leaked them, depending on whom you talk to), but not their drive impressions. The site page says it will come in four trims for the Russian market - Drive, Active, Active+ and Supreme - and offer three engines. Our specifications will certainly differ. Other than that, all we have to go on are the looks, which some may argue are even better than the hatch thanks to a trunk line that provides more balance to that long hood up front.
The Mazda3 will go on sale later this year and US prices should be announced in September. For the time being, content yourself with the gallery of high-res images above.

Mazda Skyactiv-D racer first diesel to run at Indy in 60 years

While it may not be touting the old "Win on Sunday, sell on Monday" axiom we all know and love, Mazda recognizes that racing can only improve its cars. And so it's no surprise that the Japanese automaker is testing and refining its Skyactiv-D diesel engine by sending it out on various race tracks around the country - notably being the first diesel ever to compete at Daytona and the first to notch a Grand Am win at Road Atlanta.
Next up? Indy. It has been over 60 years since a diesel-powered machine ran at the Indianapolis Motor Speedway, and the Cummins-powered racer that competed in the 1952 Indy 500 with a 6.6-liter inline-six-cylinder oil-burner was a fast and brutal machine that set a new lap record in qualifying leading up to the race. Though that car was withdrawn with turbocharger failure 71 laps in, its diesel powerplant left an indelible impression on the racing community, and that's something Mazda hopes to accomplish once again.
Mazda says that the diesel engine in its race car is pretty darn close to stock - 51 percent stock by parts count, and 63 percent stock by weight - which means the way it performs in competition is at least a somewhat meaningful way to the stock engine's durability in the real world. Check out the image of the Mazda6 Skyactiv-D racer posing alongside the 1952 Cummins above (click to enlarge) and feel free to peruse the press release below for the rest of the details.