1986 Castrol 500

Cars competed in three engine displacement classes:[1] The race was won by the Peter Jackson Nissan Skyline turbo of George Fury and Glenn Seton from their teammates Gary Scott and Terry Sheil, with the V8 Holden Commodore of Allan Grice and Graeme Bailey finishing third.

Brock had won pole for the race in Saturday's "Castrol Chargers" top ten runoff with a time of 1:49.84.

Defending race winners Jim Richards and Tony Longhurst finished two laps down in 5th place in their JPS Team BMW 635 CSi.

Co-driving with Peter Williamson in his Toyota Celica Supra, the pair finished 10th outright.

As sourced:[2] A "Castrol Chargers" session, contested for the first time in 1986, involved the top ten cars from qualifying undertaking two single-lap runs to determine the final grid order for the race.