Red Bull Racing's Mark Webber topped the times in final practice ahead of qualifying for this Sunday's Malaysian Grand Prix.
Webber moved to the head of the timesheets late on and eventually finished FP3 with a 1 minute 33.542 seconds, just edging out Lewis Hamilton, who dominated practice on Friday and who was just 0.017 seconds slower in his McLaren.
Sebastian Vettel was third in the other Renault-powered Red Bull RB6 and he also posted a 1m 33.5s lap, to leave him just 0.028s off Hamilton (and 0.045s off his team-mate).
Fernando Alonso was next up for Ferrari, two tenths off the top three, and a similar amount up on Michael Schumacher, who was fifth for Mercedes and for once ahead of his team-mate, Nico Rosberg in P6.
Australian Grand Prix winner, Jenson Button ended proceedings in seventh, more than half a second off Hamilton in the other McLaren, while Felipe Massa also seemed to struggle finishing in eighth on a 1m 34.174s.
Rubens Barrichello and Robert Kubica rounded out the top ten, 'best of the rest' after the 'big four' for Williams and Renault respectively, with Force India's Adrian Sutil and Toro Rosso's Sebastien Buemi not far behind in eleventh and twelfth.
Nico Hulkenberg, Vitantonio Liuzzi, Jaime Alguersuari and Vitaly Petrov filled positions 13 through to 16, the latter four tenths up on the two Sauber's of Pedro de la Rosa and Kamui Kobayashi.
Timo Glock was the quickest driver for one of the three new teams, around a tenth up on his former Toyota team-mate Jarno Trulli. Glock's best lap in his Virgin car was a 1m 37.299s, 3.7 seconds off the ultimate pace and 0.070 seconds up on Trulli's Lotus.
Of the rest, Heikki Kovalainen came in 21st, losing a front wing element late on, followed by Lucas di Grassi and the Hispania cars of Bruno Senna and Karun Chandhok.
Qualifying now gets underway at 09.00 hours British time and while FP3 remained dry, the signs are that it could be wet later on.