Rubens Barrichello was fastest in official Formula One testing on Thursday while Heikki Kovalainen crashed the new Lotus on its second day back on the track.
Wet conditions again hampered the teams, who have just two more days in Jerez and next week's test in Barcelona before the season-opening race in Bahrain on March 14.
Brazil's Barrichello set a top lap time of 1 minute 27.145 with newcomer Vitaly Petrov of Russia second quickest in the Renault.
TIMES (All timings are unofficial)
Pos /Driver /Car/Time /Laps
1. Rubens Barrichello Williams1:27.145 98 2. Vitaly Petrov Renault 1:27.828 56 3. Sebastian Vettel Red Bull1:28.162 70 4. Nico Rosberg Mercedes Petronas 1:28.515 71 5. Felipe Massa Ferrari 1:28.879 92 6. Pedro De La Rosa BMW Sauber 1:29.691 8 7. Paul Di Resta Force India 1:30.344 33 8. Timo Glock Virgin Racing 1:30.476 72 9. Tonio Liuzzi Force India 1:30.666 24 10. Lewis Hamilton Vodafone McLaren Mercedes 1:30.979 57 11. Sebastien Buemi Toro Rosso 1:32.678 57 12. Heikki Kovalainen Lotus 1:33.554 30