Scott McLaughlin has set the fastest time in the final practice session of the weekend ahead of qualifying for Race 10 at Barbagallo.
The Fujitsu GRM Holden driver jumped from 27th to the top of the order with six minutes remaining to edge previous fast-man Jason Bright by 0.11s.
Bright, another to save his best set of pre-marked tyres for Practice 4, set his best time during a rapid three-lap spell mid-session.
Alexandre Premat ended up third after running a near identical session plan to team-mate McLaughlin.
Mark Winterbottom, Chaz Mostert, Will Davison, Craig Lowndes, Fabian Coulthard, Alex Davison and Tony D’Alberto completed the top 10.
Will Davison had set the pace early before switching to a long-run program, completing a 17 lap unbroken spell that began in the mid-56s and ended in the high 57s.
Whincup meanwhile ran a 25 lap stint, replicating the exact duration of each leg of this afternoon’s Super Sprint format.
The Red Bull Holden driver recorded an early best of 56.19s before eventually sliding into the 58s.
Lee Holdsworth endured a spectacular off at Turn 4 late in the session, but proved that his car escaped unharmed by setting his fastest time of the 30 minutes on the following lap.
Less than a second covered the top 26 cars, while Maro Engel continued to suffer from throttle issues in his #9 SP Tool Mercedes, and was 27th.
Dean Fiore and Shane van Gisbergen were both forced to serve one minute pitlane hold penalties during the session after failing to illuminate the tyre light in their cars while running the soft compound on Friday.
The pair went on to set the 13th and 21st quickest times in the session respectively.
A 20 minute qualifying session will kick-off at 1205 local time.
See below for the full Practice 4 result
|1||Fujitsu Racing GRM||Scott McLaughlin||Holden Commodore VF||0:55.6184|
|2||Team BOC||Jason Bright||Holden Commodore VF||0:55.7306||0:00.1122|
|3||Fujitsu Racing GRM||Alexandre Premat||Holden Commodore VF||0:55.8772||0:00.2588|
|4||Pepsi Max Crew FPR Ford||Mark Winterbottom||Ford Falcon FG||0:55.8908||0:00.2724|
|5||Wilson Security Racing||Chaz Mostert||Ford Falcon FG||0:55.8925||0:00.2741|
|6||Pepsi Max Crew FPR Ford||Will Davison||Ford Falcon FG||0:55.9009||0:00.2825|
|7||Red Bull Racing Australia||Craig Lowndes||Holden Commodore VF||0:55.9572||0:00.3388|
|8||Lockwood Racing||Fabian Coulthard||Holden Commodore VF||0:55.9984||0:00.3800|
|9||Jeld-wen FPR Ford||Alex Davison||Ford Falcon FG||0:56.0038||0:00.3854|
|10||Team HIFLEX||Tony D’Alberto||Holden Commodore VF||0:56.0104||0:00.3920|
|11||Wilson Security Racing||David Wall||Holden Commodore VF||0:56.0538||0:00.4354|
|12||Holden Racing Team||James Courtney||Holden Commodore VF||0:56.1162||0:00.4978|
|13||Dodo Insurance Racing||Dean Fiore||Holden Commodore VF||0:56.1279||0:00.5095|
|14||HHA Racing||Tim Slade||Mercedes E63 AMG||0:56.1640||0:00.5456|
|15||Red Bull Racing Australia||Jamie Whincup||Holden Commodore VF||0:56.1885||0:00.5701|
|16||Supercheap Auto Racing||Russell Ingall||Holden Commodore VF||0:56.2475||0:00.6291|
|17||The Bottle-O FPR Ford||David Reynolds||Ford Falcon FG||0:56.3002||0:00.6818|
|18||Irwin Racing||Lee Holdsworth||Mercedes E63 AMG||0:56.3023||0:00.6839|
|19||ekol Racing||Scott Pye||Holden Commodore VF||0:56.3497||0:00.7313|
|20||Norton 360 Racing||Michael Caruso||Nissan Altima||0:56.3709||0:00.7525|
|21||TEKNO Team VIP||Shane Van Gisbergen||Holden Commodore VF||0:56.3869||0:00.7685|
|22||Wilson Security Racing||Tim Blanchard||Ford Falcon FG||0:56.3939||0:00.7755|
|23||Tekno Autosports||Jonathon Webb||Holden Commodore VF||0:56.4238||0:00.8054|
|24||Holden Racing Team||Garth Tander||Holden Commodore VF||0:56.4982||0:00.8798|
|25||Jack Daniel’s Racing||Rick Kelly||Nissan Altima||0:56.5219||0:00.9035|
|26||Jack Daniel’s Racing||Todd Kelly||Nissan Altima||0:56.5929||0:00.9745|
|27||SP Tools Racing||Maro Engel||Mercedes E63 AMG||0:56.7045||0:01.0861|
|28||Norton 360 Racing||James Moffat||Nissan Altima||0:56.9540||0:01.3356|