Brad Jones Racing strengthened its grip on first and second in the PIRTEK Pit Stop Challenge at Winton, where there was significant change behind them.
Saturday's Truck Assist Winton SuperSprint race was the sixth of nine points-scoring rounds before the top four teams contest a televised grand final at the Supercheap Auto Bathurst 1000.
BJR's entries of Tim Slade and Nick Percat started the weekend first and second and remained there, extending their lead over the pack.
They were 13 and one point ahead of third place respectively pre-event, but are now out to 17 and six; Slade on 122 and Percat on 111.
Percat's Honda Motorcycles-liveried Commodore was third fastest from pit entry to pit exit with a time of 33.7306 seconds, with Slade's Freightliner Racing Holden fourth.
PIRTEK Pit Stop Challenge points after six events
Behind them in a shuffled overall order, third down to seventh are separated by just five points.
Andre Heimgartner's Plus Fitness Nissan and Jamie Whincup's Red Bull Holden moved from sixth and eighth to third and fourth, with 105 and 103 points.
Whincup had the quickest pitlane time on Saturday, a journey of 33.321s shading Heimgartner's 33.717s as the pair moved into the final Bathurst spots.
Chaz Mostert's Supercheap Auto Mustang and Rick Kelly's Castrol Nissan fell from third and fourth to sixth and seventh, after missing the Winton top 10.
Tickford Racing, like BJR and Kelly Racing, has two entries in the top seven, with The Bottle-O Mustang of Lee Holdsworth sitting fifth.
Race 13 PIRTEK Pit Stop Challenge results
Mobil 1 MEGA Racing for Scott Pye started the weekend in touch with the finals spots, occupying seventh and nine points behind Percat in second.
However he was only 18th-fastest at Winton and while still eighth, Pye is back to 13 points behind Kelly in seventh.
The 2018 winner, Scott McLaughlin's Shell V-Power Racing crew rose to 18th amid its recovery from a tough start.
McLaughlin was fourth at Winton on his way to victory on Saturday, but remains 43 points off a finals place with three points-scoring rounds remaining.
The 2019 PIRTEK Pit Stop Challenge continues at next month's BetEasy Darwin Triple Crown.