NB: The times below are unofficial, and should be taken with a grain of salt, as each car was using tyres in different conditions. Some teams used brand-new rubber, while others ran on used tyres.
The UK driver, who will drive with Craig Lowndes in the #888 Vodafone-backed Commodore VE II, recorded the time on a day of varied conditions, including heavy rain and drying tracks.
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Priaulx's running was hampered by an engine change in the morning. The team changed the engine, going on to set the best time of the day, no doubt helped by his six previous starts in V8 endurances races in the past.
Lowndes was on hand at the track but did not complete any meaningful running in the car.
Second fastest of the internationals was Toll Holden Racing Team's Ryan Briscoe, ahead of Jack Daniel's IndyCar driver Scott Dixon, Fujitsu Racing's Patrick Long and former Formula One world champion Jacques Villeneuve.
Drivers and teams will hit the newly-shortened Surfers Paradise street circuit for first official practice on Friday morning.
INTERNATIONAL DRIVER TIMES
PRIMARY DRIVER TIMES
NOTE: Times were set in varying weather conditions on different quality of tyres.