Webber pointed to the high wear of the new Pirelli tyres as the key reason for the mystery.
"We had a pretty good run today, we’re learning plenty, so a positive outing for us," said Webber. "Overall the car ran smoothly and once again we amassed a huge amount of data for the guys back at the factory to go through. We’d like to get a bit more mileage tomorrow in the dry, but that doesn’t look like it’s going to happen, it looks like it will be wet."
"As usual at tests, the question of the pecking order comes up all the time but, honestly, I have no idea."
"There are a few quick cars out there, but in winter testing it’s so hard to say if anyone’s better than anyone else, especially with the tyres going off the way they are – you’re losing four or five seconds over the course of a stint, so figuring out who’s doing what is pretty difficult. All we can do is keep pushing, keep developing and keep our eyes fixed on the first race."