Lewis Hamilton topped the times again in Friday's second free practice session ahead of this weekend's Spanish Grand Prix, lapping nearly half a second faster than his Mercedes team-mate Nico Rosberg.
The 29-year-old Briton clocked a best lap of one minute and 25.524 seconds in his Mercedes before switching to an impressive demonstration of speed on a long 'race spec' run. German Rosberg's best time was 1:25.973.
Hamilton was also fastest in the first session as he proved he has lost little of his massive performance advantage over his rivals despite all the teams arriving in Spain with a raft of upgrades for their cars.
Australian Daniel Ricciardo was third fastest for Red Bull, nine-tenths of a second slower than 2008 champion Hamilton. He was the only man to be less than a second a lap adrift of the pace-setter who, after three straight wins, is seeking to claim his first Spanish Grand Prix triumph.
The Ferrari pairing of two-time champion and local hero Fernando Alonso and Finn Kimi Raikkonen took fourth and fifth places, the Italian team bidding to win a race for the first time since Alonso triumphed on home soil a year ago.