Feb.2 (GMM) BMW-Sauber boss Mario Theissen on Sunday admitted that the team is still working to extract the full potential of the newly launched 2008 car. "We are not yet satisfied with the lap times," the German told the Bild am Sonntag newspaper as the Swiss based outfit tests at Barcelona's Circuit de Catalunya.



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Williams did not test on the last of a scheduled three day test in Barcelona on Sunday, preferring instead to return to its Oxfordshire base to work on a front wing mounting problem with its new 2008 car, the FW30.



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Toro Rosso drivers Sebastian Vettel and Sebastien Bourdais were quickest of the 14 runners at Circuit de Catalunya on Saturday. The Italian team admitted that the impressive lap times were achieved by running with low fuel for simulated qualifying runs.