@IanStephens: Preference for oversteer etc. varies driver to driver and is not really an age thing. Reaction times might dull slightly over the years but I would be very surprised if that's the case.
Vettel, Ricciardo and Rosberg on track right now. Rosberg has gone to the soft tyre - he set the fastest time of the test on those on Friday, can he match it today?
@mfbull: It will be really interesting to see how the situation develops between the Mercedes drivers this year. I think we will see confrontations if it is close again, but a few reliability issues for Rosberg and I could see Hamilton getting and quite easily maintaining a lead in the championship.
@MrTuK: Most drivers prefer a neutral car, but some are better at dealing with understeer or oversteer than others. It's true to say that the best cars are the ones that a driver can get the most out of, even if it is down slightly on peak downforce. McLaren has made a big thing about a philosophy change at Woking from chasing the best possible figures in simulation to getting an easy to drive car.
@ChristianPisani: He's on a race sim now, but it was interrupted earlier after about 20 laps and he had to briefly return to the garage.
Vettel, Nasr and Ricciardo now on track.
Nasr is closing on 150 laps today as Sauber go for one last push in the final hour
@farrugiamaths: They will change it for big sponsor but were coy about whether that would come. But there are rumours that we will see more of a Honda-style livery this year.
@NorbertHaug: Nope, he returned to the pits and did not improve on his earlier medium-compound lap.
As I type, Rosberg heads out again.
Toro Rosso have the car back on track after that earlier stoppage that caused a red flag.
@Rob: The cameras are coloured black or yellow on each car to distinguish between team-mates
@ChewyF1: Sauber have gone for some pretty big numbers this year.
@canuck: Currently 22C track and 18C air temp.