Helio Castroneves led a Penske one-two-three as part one of IndyCar open testing concluded at Sebring on Tuesday.
An initial group of 10 cars ran for the first two days, before the remainder of the 2012 field takes to the track on Thursday and Friday.
Castroneves was quickest in both Tuesday sessions, with a lap of 52.1413 seconds in the afternoon securing the top spot overall.
Fellow Penske men Will Power and Ryan Briscoe were second and third, despite Power suffering a small fire on his car for the second time in as many days.
Monday pacesetter Ryan Hunter-Reay was fourth for Andretti Autosport on day two, while Schmidt-Hamilton's Simon Pagenaud was again the best of the Honda runners present.
HVM's Simona de Silvestro, the sole Lotus-powered driver in the group, brought up the rear but had a much smoother day than Monday and was closer to the pace.
Pos Driver Team/Car/Engine Time Gap 1. Helio Castroneves Penske DW12-Chevrolet 52.1413s 2. Will Power Penske DW12-Chevrolet 52.2059s + 0.0646s 3. Ryan Briscoe Penske DW12-Chevrolet 52.2072s + 0.0659s 4. Ryan Hunter-Reay Andretti DW12-Chevrolet 52.3466s + 0.2053s 5. Simon Pagenaud Schmidt DW12-Honda 52.4698s + 0.3285s 6. Justin Wilson Coyne DW12-Honda 52.6537s + 0.5124s 7. James Jakes Coyne DW12-Honda 52.8288s + 0.6875s 8. James Hinchcliffe Andretti DW12-Chevrolet 52.9125s + 0.7712s 9. Marco Andretti Andretti DW12-Chevrolet 52.9577s + 0.8164s 10. Simona de Silvestro HVM DW12-Lotus 53.2312s + 1.0899s