Valtteri Bottas was fastest for Williams as pre-season testing came to a close at the Circuit de Catalunya.
Bottas topped the timesheets for most of the final day after clocking a series of quick runs in the morning, posting a time of 1:23.063 on the super-soft tyres which remained unbeaten in the afternoon.
The Finn completed 89 laps across the course of the day before Williams wrapped up its testing programme early, with 90 minutes left to run.
Sebastian Vettel ended the day second for Ferrari and was another driver to set his best time during the closing stages of the morning session on the super-soft tyres.
The four-time champion ended the day with 122 laps on the board, despite a setback in the afternoon after he was forced to abort his attempted race simulation.
Felipe Nasr racked up 159 laps – the most of any driver on the final day of running – on route to third for Sauber, after setting his best lap in the morning on the super-softs.
Max Verstappen caused a late stoppage after a technical issue, but rallied with a late lap on the red-banded super-soft tyres to end the day fourth for Toro Rosso.
Daniel Ricciardo managed just 10 laps in the morning for Red Bull after prompting the first red flag of the day after a stoppage at the end of the pitlane, but added 60 laps to his tally in the afternoon, despite a lengthy stay in the garage following an ERS problem.
Sergio Perez completed 130 laps on his first day at the wheel of the new Force India, and was another driver to set his best time in the morning on the super-soft Pirellis.
Nico Rosberg set the pace during the opening hours of running, but tumbled to seventh in the standings by the end of the day, as Mercedes concentrated on mileage – the German managing 148 laps by the end of play.
McLaren completed limited running on the final day of testing as Jenson Button spent most of the morning session confined to the garage in the MP4-30.
The 2009 champion made a brief appearance ahead of the lunch break, and returned to the track in the afternoon to complete 28 laps before the end of the day.
Pastor Maldonado was eight fastest for Lotus in the morning, but cut short the team’s test programme with a crash at Turn 4 just minutes into the afternoon session.
This article first appeared on Richland F1 – Images courtesy of Pirelli and Scuderia Ferrari