Shane van Gisbergen beat team-mate Jamie Whincup by half a second as they finished first and second in practice on the opening day of the OTR SuperSprint at The Bend.
The Red Bull Holden Racing Team duo and Practice 1 fast man Tim Slade were the only three drivers to drop under 1:50s bracket during their green tyre runs in the second 45-minute session of the day.
Van Gisbergen spent almost the entirety of Practice 2 in the lead having reeled out a 1:50.1652s on his first flyer.
That time stood up as the benchmark until the #14 Freightliner ZB Commodore took on new tyres and Slade clocked a 1:49.7093s.
Van Gisbergen was on his hot lap at the same time, however, and went nearly a second faster again with a 1:48.7499 in the #97 ZB Commodore.
Whincup then split them with a 1:49.3231s, 0.5732s slower than his team-mate.
Chaz Mostert was another half-second off Slade’s pace as he ended up the fastest Ford driver for the second session in a row in the #55 Supercheap Auto FGX Falcon.
“There’s still a fair bit left and obviously there is; there is no way we’re genuinely a second faster,” said van Gisbergen.
“The track’s tough, there’s probably people making mistakes. There’s probably half a second in driving and a fair bit left in car.
“We’ll see the evolution of that over the weekend.”
Nick Percat (#8 Mobil ZB Commodore) finished fifth but was the only driver in the top 15 to not improve in his final run.
Three Nissans followed in the form of Rick Kelly (#15 Castrol Altima), Simona de Silvestro (#78 Harvey Norman Altima), and Andre Heimgartner (#7 Plus Fitness Altima).
Mark Winterbottom (#5 The Bottle-O FGX Falcon) and Scott Pye (#2 Boost Mobile ZB Commodore) rounded out the top 10.
Scott McLaughlin (#17 Shell V-Power FGX Falcon) ended up only 12th after sliding off the dirt exiting Turn 13 during his green tyre run.
Craig Lowndes was seen sliding or running off-road several times in the #888 Autobarn ZB Commodore on his way to 27th, nearly 3.7s off the pace.
There will be a third 45-minute practice session for the Virgin Australia Supercars Championship field tomorrow at 1035 local time/1105 AEST.
Results: Supercars Practice 2
|1||97 Red Bull Holden Racing Team||Shane Van Gisbergen||Holden Commodore ZB||1:48.7499RS|
|2||1 Red Bull Holden Racing Team||Jamie Whincup||Holden Commodore ZB||1:49.3231rS||00.5732|
|3||14 Freightliner Racing||Tim Slade||Holden Commodore ZB||1:49.7093rS||00.9594|
|4||55 Supercheap Auto Racing||Chaz Mostert||Ford Falcon FG/X||1:50.2403 S||01.4904|
|5||8 X-Convenience – Mobil Racing||Nick Percat||Holden Commodore ZB||1:50.3341 S||01.5842|
|6||15 Castrol Racing||Rick Kelly||Nissan Altima||1:50.4181 S||01.6682|
|7||78 Team Harvey Norman||Simona De Silvestro||Nissan Altima||1:50.4997 S||01.7498|
|8||7 Plus Fitness Racing||Andre Heimgartner||Nissan Altima||1:50.5492 S||01.7993|
|9||5 The Bottle-O Racing Team||Mark Winterbottom||Ford Falcon FG/X||1:50.5599 S||01.8100|
|10||2 Mobil 1 Boost Mobile Racing||Scott Pye||Holden Commodore ZB||1:50.5884 S||01.8385|
|11||21 Team CoolDrive||Tim Blanchard||Holden Commodore ZB||1:50.7163 S||01.9664|
|12||17 Shell V-Power Racing Team||Scott McLaughlin||Ford Falcon FG/X||1:50.8917 S||02.1418|
|13||230 Milwaukee Racing||Will Davison||Ford Falcon FG/X||1:50.9424 S||02.1925|
|14||18 Preston Hire Racing||L.Holdsworth/J.Bright||Holden Commodore ZB||1:50.9834 S||02.2335|
|15||9 Erebus Penrite Racing||David Reynolds||Holden Commodore ZB||1:51.0158 S||02.2659|
|16||23 Drive Racing||Michael Caruso||Nissan Altima||1:51.0391 S||02.2892|
|17||56 RABBLE.club Racing||Richie Stanaway||Ford Falcon FG/X||1:51.0515 S||02.3016|
|18||4 DrillPro Racing||Macauley Jones||Holden Commodore ZB||1:51.0994 S||02.3495|
|19||35 Bigmate Racing||Todd Hazelwood||Holden Commodore VF||1:51.1867 S||02.4368|
|20||25 Mobil 1 Boost Mobile Racing||James Courtney||Holden Commodore ZB||1:51.1909 S||02.4410|
|21||6 Monster Energy Racing||Cameron Waters||Ford Falcon FG/X||1:51.2037 S||02.4538|
|22||99 Erebus Motorsport||Anton de Pasquale||Holden Commodore ZB||1:51.2070 S||02.4571|
|23||19 Tekno Autosport||Jack Le Brocq||Holden Commodore ZB||1:51.8586 S||03.1087|
|24||33 Wilson Security Racing GRM||Garth Tander||Holden Commodore ZB||1:51.9310 S||03.1811|
|25||12 Shell V-Power Racing Team||Fabian Coulthard||Ford Falcon FG/X||1:52.0252 S||03.2753|
|26||42 Arcoplate Racing||Kurt Kostecki||Holden Commodore VF||1:52.2995 S||03.5496|
|27||888 Autobarn Lowndes Racing||Craig Lowndes||Holden Commodore ZB||1:52.4465 S||03.6966|
|28||34 Wilson Security Racing GRM||James Golding||Holden Commodore ZB||1:54.1096 S||05.3597|