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Mazda is back in the TUDOR United SportsCar Series with a race car powered by a diesel engine. At this weekend’s Rolex 24 at Daytona, Mazda’s two SKYACTIV Prototype cars will have the only diesel powerplants in the season-opening TUDOR United SportsCar Series race. The inline four-cylinder 2.2-liter Mazda engine continues into 2015 with its […]

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