Finn makes his second appearance in a row, driving the Ferrari Fernando Alonso nearly took to the 2010 world championship up Goodwood's famous hill climb.
FIA confirms Mercedes and Ferrari have not been using 'trick oil' systems to gain an advantage over their rivals after detailed investigations of both teams at Canadian Grand Prix.
Ferrari boss insists the team's focus is still on beating Mercedes, "not in 2020 - this year".
German picks up where he left off during Austrian Grand Prix by ending the test over eight tenths clear of Ferrari's Esteban Gutierrez.
Finn clocked a 1:10.029 in the FW37, while Nico Rosberg finished the morning third for Mercedes and Fernando Alonso managed just 17 laps in the McLaren MP4-30.
Mercedes junior keeps the world champions top of the timing screens after day of testing hampered by rain at Red Bull Ring.
Maurizio Arrivabene wants Ferrari to run full fuel during Friday practice sessions to gain an accurate comparison to Mercedes' race pace.
Maurizio Arrivabene has named the areas in which Kimi Raikkonen will be judged ahead of a decision on the Finn's future later in the year.
Convinced Ferrari is closer to Mercedes than Austria result suggests despite second race in a row which saw neither driver make the podium.
Kimi Raikkonen could not explain the reason behind his collision with Fernando Alonso at the Austrian Grand Prix, but appeared unruffled by the dangerous situation it left him in.
Spaniard ended up on top of former team-mate's car after first-lap collision on the exit of Turn 2.
German qualified third as Mercedes locked out front row but thinks Ferrari's race pace this weekend is need for improvement.
Massa nearly ran over Ferrari boss in pit wall but managed to stop short - something the pair shared a joked about later on during Friday practice.
Finn only completed one lap on the option tyre,f while Ferrari team-mate's Sebastian Vettel's own run on super-softs ended prematurely.
Ferrari driver returned to the garage at the end of FP2 with a gearbox issue; says it was unrelated to FP1 stoppage.
Kimi Raikkonen has hit out at stories claiming he would accept a pay cut in order to be kept on at Ferrari next year.
Four-time world champion says Ferrari needs to be realistic about its chances this weekend, but says it is closer to Mercedes now than it was in winter.
Toto Wolff refuses to write off Ferrari despite the utter dominance of Mercedes' one-two in Montreal.
Finn returns to popular fan event for second year in a row and will get behind the wheel of the Ferrari F10, with Felipe Massa also set to attend in a 1990 Williams.
GP3 driver Antonio Fuoco will test for Ferrari alongside Esteban Gutierrez at the post-race test in Austria.
Italian youngster handed another day behind the wheel after driving for both Sauber and Ferrari at the post-Spanish GP test.
Ferrari boss refuses to change winter goal of scoring two victories in 2015 despite seeing Mercedes' dominant one-two in Canada.
Finn welcomes safety measures in F1 but thinks sport may have gone too far at the expense of the spectacle.
Says team will only favour one driver when the other one no longer has mathematical chance of winning the championship.
Insists Ferrari is making progress but thinks it was wrong to expect Canadian engine upgrade would wipe out Mercedes' advantage.
The latest betting tips from the ESPN team, in association with bet365
ESPN UK is looking to discover which city in the UK is the best place to be for sport - and we need you to help us.
Watch every fixture from March Madness LIVE and on-demand with ESPN Player. Available across Europe, subscribe today.
Save 10% off your first order in the ESPNscrum shop. Replica international and club jerseys, official balls and more.