Heikki Kovalainen finally had something to smile about this week after topping the times on the final day of pre-Malaysian Grand Prix testing in Sepang on Friday.
The Finn, who had a disappointing F1 debut in Australia and was bottom of the timesheets on Thursday, set a confidence-boosting time that was four hundredths of a second faster that Ferrari's Felipe Massa.
With drivers clearly trying out new tyre runs ahead of next weekend's race, Anthony Davidson was a surprise third fastest as Super Aguri's SA07 proved that the form it showed in Australia was not a flash in the pan.
Nico Rosberg was fourth fastest for Williams, with the team having stated this week that they wanted to work on their pace over a single lap following their disappointing qualifying performance in Australia.
Toyota's Franck Montagny was fifth quickest, ahead of BMW Sauber's Nick Heidfeld and Honda Racing's Jenson Button, who only took part in the morning session.
Lewis Hamilton completed his pre-Malaysian GP preparation in the morning to set the eighth quickest time, before handing over his McLaren to Pedro de la Rosa in the afternoon.
There were a total of five red flags during the session, two of them caused by Kovalainen, who stopped on track at 14:40 and then again at at 15:30.
Heidfeld forced the session to be red-flagged just four minutes in, when he suffered an engine-related problem.
Hamilton was next when he suffered an oil leak around noon, and Mark Webber followed suit two hours later when his Red Bull RB3 came to a halt on track.
The session was again hit by rain, with a downpour around 3pm.
Pos Driver Team Time Laps 1. Kovalainen Renault (B) 1:35.767 55 2. Massa Ferrari (B) 1:35.808 72 3. Davidson Super Aguri-Honda (B) 1:36.787 68 4. Rosberg Williams-Toyota (B) 1:37.002 104 5. Montagny Toyota (B) 1:37.206 78 6. Heidfeld BMW Sauber (B) 1:37.318 70 7. Button Honda (B) 1:37.326 37 8. Hamilton McLaren-Mercedes (B) 1:37.448 43 9. Webber Red Bull-Renault (B) 1:37.778 42 10. Liuzzi Toro Rosso-Ferrari (B) 1:38.542 56 11. Klien Honda (B) 1:39.176 25 12. de la Rosa McLaren-Mercedes (B) 1:39.303 24 All Timing Unofficial