OSCA (Open Saloon Car Association) formed in 1971 is the longest running series in the South Island. OSCA offers a wide range of open saloon cars racing all around the South Island.

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The OSCA Super Saloon Series is  a racing series where the competitors are free to design and build the widest possible variety of cars. The Technical Regulations have been formulated to promote the “Kiwi Ingenuity” that has been the mainstay of New Zealand MotorSport for decades and to provide a class where American and Australian V8s can compete head to head with high-tech Japanese and European cars.