ASCS - Lucas Oil National Sprint Cars | American Sprint Car Series, The American Sprint Car Series is the largest sprint car sanctioning body in the world. With the Lucas Oil National Series backed by numerous regional series, one can catch all the excitement of an ASCS Sprint Car race at racetracks across the United States. The top winged sprint car drivers across the country compete in ASCS competition, with the best of the best gunning for that precious and prestigious Lucas Oil ASCS National Championship!.