The #70 Castrol Edge SpeedSource Mazda6 SKYACTIV-D Clean Diesel took the GX-class checkered flag at the Grand-AM finale at Lime Rock Park, delivering Mazda more hardware for the trophy case, including the coveted manufacturers championship. In 12 races, the SpeedSource Mazda team scored nine wins; five wins for the #00 VISITFLORIDA.com Mazda6 and four for the #70 Castrol Edge Mazda6. The Mazda6 replaced the RX-8 in Grand-Am for 2013 and Mazda took the opportunity to drop a production-based Mazda SKYACTIV-D diesel engine in the new car and compete in the GX class where its main rival was Porsche. The all-new SKYACTIV-D Clean Diesel engine in the all-new Mazda6 is a true production-based engine. The engine is 51-percent stock by parts count, and 63-percent stock by weight. Mazda chose this path, as it is the most honest way to demonstrate the quality, durability, and reliability of Mazda cars. After the season finale SpeedSource team principal Sylvain Tremblay said, "the two words that summarize this season are courage and efficiency. It was courageous of Mazda to develop this engine in competition. It would have been much easier to sit out 2013 waiting for the new United SportsCar series rather than testing in public. To score nine wins is a tribute to the hard work from everyone at Mazda, SpeedSource and our partners. The efficiency is what the SKYACTIV technology delivered. We ran today on a single stop. It was an amazing performance from a production engine."