While the Newcastle 500 is a motor racing event for Supercars, the Supercars Championship is what?
Supercars Championship: The Supercars Championship (known as the Virgin Australia Supercars Championship for sponsorship purposes and often shortened to just Supercars or its long-standing name V8 Supercars) is a touring car racing category based in Australia and run as an International Series under Fédération Internationale de l'Automobile (FIA) regulations.
i don't know