The final day of this week's test saw Lewis and Heikki continue the programme of Bridgestone tyre evaluation and reliability confirmation and aerodynamic and set up development work. The team also focused on longer runs with the MP4-23 package, with fewer red flag stoppages at the Spanish circuit. Just over an hour before the end of the session, it began to rain. The conditions remained damp for the remainder of the day.
"Today we completed an intensive and productive session at the Barcelona circuit. It is always interesting when we test here for the first time with a new car, as you have a comprehensive evaluation of the whole package. We have made some good progress and have gathered some useful intelligence this week, which we will take back to the McLaren Technology Centre and incorporate this into the development of the car in the 10 days until the next track test. This is a demanding time of year for the team, we ask a lot of every single member as we work to reach the level of competitiveness we want for Australia. The progress we are making is quantifiable and the drive within the team to continue to push remains high."