Jamie Whincup held off title rivals Mark Winterbottom and Craig Lowndes to win the final race of V8 Supercars' Phillip Island weekend.
Lowndes had boosted his championship hopes with a superb charge to victory in Sunday's opening race, and burst to the front again around the outside at the start of race three.
But this time Lowndes could not stay up front, with both Triple Eight Holden team-mate Whincup and Ford Performance Racing's Winterbottom overtaking him in the early laps.
Two mid-race safety cars - the first when Lee Holdsworth's Mercedes shed a wheel, the second after a multi-car midfield tangle on the restart lap - kept the leaders close.
Winterbottom was all over Whincup for the lead into the closing laps, but the champion produced a record lap to get a bit of breathing space.
Whincup crossed the line 0.8 seconds ahead as Winterbottom had to focus on pressure from Lowndes for second.
The result means Whincup goes to next month's Sydney decider 20 points ahead of Lowndes, with 300 available.
Brad Jones Racing duo Jason Bright and Fabian Coulthard completed the top five, followed by Winterbottom's team-mate Will Davison.
Nissan got two drivers in the top eight with James Moffat and Rick Kelly.
Results - 23 laps: Pos Driver Team/Car Time/Gap 1. Jamie Whincup Triple Eight Holden 42m22.9005s 2. Mark Winterbottom FPR Ford +0.8850s 3. Craig Lowndes Triple Eight Holden +1.4046s 4. Jason Bright Brad Jones Holden +1.8961s 5. Fabian Coulthard Brad Jones Holden +2.8541s 6. Will Davison FPR Ford +4.6847s 7. James Moffat Nissan +7.5446s 8. Rick Kelly Nissan +8.5646s 9. Alex Davison Schwerkolt/FPR Ford +9.9538s 10. Shane van Gisbergen Tekno Holden +10.1618s 11. Scott McLaughlin GRM Holden +10.7854s 12. David Reynolds Rod Nash/FPR Ford +11.3211s 13. Todd Kelly Nissan +11.7627s 14. Scott Pye Dumbrell Holden +12.2277s 15. Garth Tander HRT Holden +12.8228s 16. Tim Blanchard Dick Johnson Ford +13.0401s 17. David Wall Britek/BJR Holden +13.7364s 18. Dean Fiore Dumbrell Holden +14.9464s 19. Maro Engel Erebus Mercedes +16.3100s 20. Tim Slade Rosenberg/Erebus Mercedes +27.8549s Retirements: Michael Caruso Nissan 21 laps Chaz Mostert Dick Johnson Ford 14 laps Russell Ingall Walkinshaw/HRT Holden 14 laps Jonathon Webb Tekno Holden 12 laps Tony D'Alberto D'Alberto Holden 11 laps Lee Holdsworth Erebus Mercedes 9 laps