Rosberg has re-claimed top spot with a 1:27.142.
Alonso's mileage has reached the dizzy heights of six laps. The Spaniards here are going to be disappointed when he gives the car over to Button at lunch.
@manor: There's a big difference between testing and racing. Force India did make clear that their main concerns - and those of the F1 Strategy Group - was the lack of overall plan moving forward for Manor. However, it seems a lot of those concerns have been addressed in recent weeks by Manor, although quite when they would have a 2015 car ready (Bahrain, possibly) is not yet clear.
@brent: It's more about fuel levels. A lot of teams won't run full qualfying-spec fuel loads, although by the end of next week most will have gone for a quick lap of some sort as they chase set-up. However, to learn about the car and the way it interacts with its tyres, it doesn't help to be running a heap of ballast just to disguise pace.
It might look sunny but the wind is pretty heavy out there - I was just stood overlooking the pit straight and it was hard to look down to the final corner. If I had any hair left it would have been blowing all over the place.
Vettel goes quickest with a 1:26.454 and on his next lap round the circuit he has the white-striped tyre on, indicating it was a soft tyre run.
That's an extreme example of the progress made by all teams up and down the grid this year. Obviously the Lotus has has a change of power unit supplier.
Sainz now puts himself into first with a soft tyre run of his own. The benchmark now down to a 1:25.694.
@nando: This car is very different to last years. Both drivers need time at the wheel at this stage of the year.
@melon: Nate informs me his favourite drivers were Michael Schumacher, Alex Wurz and anyone in a Jordan. For me it was Nigel Mansell when I was a young kid and Jacques Villeneuve and Juan Pablo Montoya when I was a bit older.
@Dhruv: Do you mean the parts they ran last year on the rear suspension arms?
@noski: Just having a dig in the archive. Looks like we only have on-track photos of the Merc and Red Bull rather than pit lane shots, but give me a minute and I'll upload the ones I've found
@Dhruv: Still not sure which bits you mean. However, rest assured, McLaren will not have added them without them coming up positive on the downforce v drag equation.
@JamesDuncan: No reason why not. The conditions are good enough but it all depends on the run plans of the teams.
@quadge: A very good effort on the number crunching! However, the headline times aren't always that representative - especially when compared to qualifying in very different conditions. I suspect the cars are more than 2.586% faster when they get down to it at full pace. The real interesting data comes in comparing long runs, but even that can be very misleading and is entirely based on assumptions. Thanks for the data though!
@RacingFan: No, Red Bull did one yesterday and Williams has been doing some decent long runs, although I'm not sure they could be classed as race simulations.