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Heifer fuel

Unlike most people, when Michael Doyle drives past a herd of cattle grazing in a field, he doesn't see future tenderloins or T-bones. He sees fuel. The company Doyle co-owns, North Star Biofuels, is about to start production of biodiesel at a new $15 million, 20,000-square-foot plant in Watsonville, Calif., about 60 miles south of San Francisco.

2013 Mazda6 Estate: Official

Mazda has revealed the Mazda6 Estate ahead of its public debut at the 2012 Paris Motor Show alongside the new Mazda 6 saloon. Last week saw the reveal of the new Mazda6 ahead of its public debut in Paris, and we knew that Mazda were planning to unveil the Estate version of the Mazda 6 at Paris too after they revealed it in Japan last month. And here it is.

2015 Ford Mustang Mach 1 rendered

File this one under "harmless speculation we're hoping Ford execs are paying attention to": Top Speed has rendered the 2015 Mustang Mach 1, giving an idea of what to expect if/when the Blue Oval trots out a hotter version of the newest pony car. The heat extractors on the hood get beefed up, and there's no missing the gigantic, adjustable front splitter. The lip spoiler on the trunk would be subtle if not for the contrasting black paint.