Kimi Raikkonen said he was feeling "very positive" after concluding a two-day test at the Valencia circuit on Tuesday.
The 2007 World Champion returned to the cockpit of an F1 car for the first time in over two years this week, as he began his preparations to race in 2012 with the Lotus team. Raikkonen covered 91 laps today for a total of 171 over the two sessions, completing the equivalent of more than two race distances.
"It went well today and overall the two days have helped me a lot," said the Finn. "Even though I was using a two-year-old car and the Pirelli demonstration tires, I learned about working with the team and the engineers which means I can focus on the new car once we get to Jerez for the first official test.
"It was great to be driving an F1 car again and from that respect I feel very positive."
Lotus's Trackside Operations Engineer Alan Permane said the the Finn's pace had improved since yesterday and labeled the test "productive and valuable."
"We enjoyed another good day with Kimi in Valencia," he said. "The morning was spent doing setup work in particular with front and rear cambers. In the afternoon, we ran very low fuel qualifying simulations with two new sets of tires followed by a 27 lap run starting with a full tank of fuel.
"Kimi's pace improved from yesterday as we would expect and we completed several start, pit stop and clutch simulations. We were even able to finish early as we completed our program ahead of time. Overall, it has been a productive and valuable two days."
Raikkonen will return to action when the team unveils its 2012 car at Jerez next month.