Momentum is a powerful thing and Mazda is experiencing it with its diesel-powered Mazda6 race car.

The SpeedSource Mazda6 SKYACTIV-D Clean Diesel team scored their sixth straight Grand-Am GX class win last weekend.

Taking the win was Joel Miller and Tristan Nunez in their #00 Racing Mazda6.

“SKYACTIV-D again proved its strength in the extremes of endurance racing,” said Joel Miller, Co-Driver of the #00 Mazda6. “The long straights here at Road America, coupled with the four-mile circuit, makes the engine work hard. The SpeedSource crew prepared a great car for us today and together we brought home another victory for the Mazda SKYACTIV Technology.”

This win puts Mazda ahead in the manufacturers championship.

The #70 Castrol Edge Mazda6 of Sylvain Tremblay and Tom Long qualified on the pole and led early before being delayed with a power-steering problem.

The middle part of the race was led by the BGB Motorsports Porsche before Miller closed in on Spencer Pumpelly and took the lead with under five minutes remaining in the two hour and 45 minute race.

According to Mazda, the 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 said it chose this path as it is the most honest way to demonstrate the quality, durability, and reliability of Mazda cars.