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Mazda brings diesel back to Indy with 6 Skyactiv-D

Diesel has enjoyed great success lately as a racing fuel, but there's one place it hasn't appeared for more than six decades: Indianapolis Motor Speedway. Mazda's breaking that dry spell this weekend, when its Mazda 6 Skyactiv-D race car will head to Indy for the Grand-Am race. We like the 6 in both road trim and racing livery, but that previous diesel-powered racer -- the Cummins Diesel Special -- is pretty neat too.

Holden will sell cars in Australia beyond 2017

When we heard about Holden's plans to shutter its Australian plants after 2017, we didn't know quite what to think. The General Motors subsidiary was cagey when it came to details, claiming that the brand would remain a presence in Australia -- even maintaining its design office there. Oddly, we couldn't get anyone to say, in black-and-white terms, what vehicles would be sold there under the Holden name after its plants close.

Mitsubishi previews three Tokyo concepts

MITSUBISHI will showcase three new concepts at the Tokyo Motor Show, all using SUV body styles. Heading the trio of experimental designs is the Concept GC-PHEV, a full-size SUV using a development of Mitsubishi’s plug-in hybrid drivetrain. It aims to offer the everyday advantages of an SUV and class-leading environmental credentials.