For the first time in six decades, #diesel will compete again at this week's #GRANDAM #Brickyard. However, this time it will be with #Mazda's #SKYACTIV diesel #Mazda6, in one of the harshest environments possible. With 51% of its components being sourced from its stock counterpart, we don't know of a better way to further test our new #SKYACTIV diesel engine.