Repsol Honda team-mates Casey Stoner and Dani Pedrosa finished one-two for the third successive session, in Sunday's warm-up for the Aragon MotoGP.
Despite much cooler and windier conditions than had been seen on Friday and Saturday, the end result was similar, with world championship leader Stoner 0.347sec ahead of Pedrosa.
As in qualifying, Yamaha's Ben Spies was best of the rest, and again with a sizeable gap to the top, this time 0.901sec.
Gresini Honda's Marco Simoncelli improved by two places relative to his qualifying position, with fourth, while world champion Jorge Lorenzo was again left shaking his head as he lapped 1.274sec slower than title rival Stoner, in fifth.
Frenchman Randy de Puniet returned to the top Ducati position he had held during free practice, in sixth (+1.357sec) for Pramac. Monster Yamaha Tech 3 team-mates Colin Edwards and Cal Crutchlow - battling a lack of top speed this weekend - enjoyed their best session of the event in seventh and eighth.
The top ten was completed by factory Ducati rider Nicky Hayden and Suzuki's Alvaro Bautista. Valentino Rossi was eleventh (1.781sec) on the 'aluminium' Ducati.
Rossi will start this afternoon's race from pit lane, 10 seconds after the others, after exceeding the six engines per rider limit. Rossi chose to fit the seventh engine on his spare bike, triggering the penalty, after a problematic qualifying left him 13th on the grid.
Fellow Italian Andrea Dovizioso, who will start fifth on the grid, was only 14th this morning.
Dovizioso and his Repsol Honda team-mates are riding in a special livery, created by Spanish designer David Delfi, today. The white and orange livery features several large stars.
6. de Puniet