Hamilton finished in fourth place, with his best time of 1:22.726 set at the start of a ten lap stint on hard tyres.
"We had a good day today and it was nice to get so many laps in," he said after completing 121 laps.
"We're making continual steps forward in terms of our understanding of the set-up and the tyres."
Hamilton spent the morning focusing on comparisons between exhaust configurations, running primarily on the hard tyres. In the afternoon, the 2008 champion concentrated on set-up work with longer runs on the medium compound.
"The hard compound work in particular was pretty good today, although all of tyres are showing degradation so looking after them isn't easy. The guys are working really hard both here and at the factory, and it's encouraging to see the amount of work that's being put in. We're focusing on our own programme and just getting on with it."
Nico Rosberg tests for the team tomorrow, with Hamilton concluding running on Friday.