The 1983 Castrol 400 was an endurance race for Group C Touring Cars held at the Sandown Park circuit in Victoria, Australia on 11 September 1983.
[1] The ease in which Moffat won his fifth Sandown endurance race put him as the hot favourite for the upcoming James Hardie 1000 at Bathurst.
Moffat had stalked early race leaders Peter Brock and Allan Grice before they both fell by the wayside leaving the Mazda to take its second straight win in the Sandown enduro.
Pre-race favourite and pole winner Peter Brock suffered a rare failure when he lost the brakes on his Marlboro Holden Dealer Team Commodore early on and actually hit the fence, forcing him out of the race.
Johnson put the now green coloured car on the front row matching Brock's pole time, although after winning the start his race ended with gearbox failure only a few hundred metres later.