The Australian driver Mark Webber showed Red Bull's pace as Formula One's final pre-season test started in Barcelona, but McLaren also picked up speed after teething problems last month.
Webber, who could become the first Australian to win his home race when the season starts in Melbourne on March 27th, lapped the Catalan circuit point 3 of a second quicker than the McLaren of Jenson Button.
The time was set in the morning, on a qualifying-style single lap, before the team switched to longer stints in the afternoon.
After completing 97 laps, Webber says it was a pretty good day and not much has changed since last week.
World champion Sebastian Vettel will be in the Red Bull tomorrow.
Russian Vitaly Petrov was third fastest for Lotus-backed Renault after taking over from German team mate Nick Heidfeld, who was suffering from a cold.
