The 22 drivers have their say on the first day of running in mixed conditions in Montreal ahead of the Canadian GP.
McLaren
Jenson Button: "I think we're a little nearer to the front than we've been in the past - the times are very close - but it'll be the usual front-running cars who set the pace this weekend.
"We needed everything to be reliable today, but I only managed three laps on my high-fuel run before I had a problem with the gearbox. That was a pity because it meant we didn't get the long-run information we were after. In fact, we had a similar issue last year, when I also had a gearbox problem on the Friday. In 2012, I had a difficult race with rear graining.
"Nonetheless, the positive from today is that each car was running a very different set-up, so at least we gathered lots of good information. We'll go away and study that tonight ahead of tomorrow's sessions.
"I'm hoping the conditions will stay mixed for tomorrow - if they do, I think we'll be able to make the best of it."
Sergio Perez: "We encountered some very tricky conditions out there today. This morning's session, when it started damp and slowly dried, was particularly difficult. The rain that fell during this afternoon's long-run didn't help, either.
"We're still lacking overall performance to the frontrunners; but anything can happen here, especially in the conditions we saw today, which were extremely varied.
"If tomorrow is as wet as today, everyone will go into Sunday without any proper long-running under their belts - that could make the race a big surprise for everybody."
Lotus
Kimi Raikkonen: "We improved the car through the day and by the end of the session it was ok; not ideal but certainly not a disaster either. It wasn't easy to get the tyres up to temperature today, but it's pretty cold at the circuit so that's not too much of a surprise. If we can get the tyres working better it will be an improvement for sure, but it's not going to change the world. We'll be looking at how to get them a bit warmer for qualifying tomorrow and then see what the weather does. After that, we'll do the best we can."
Romain Grosjean: "It was more or less a normal Friday for us. This morning was obviously a wet session so we worked on setup for those conditions, then in the afternoon we tested the prototype tyres and completed some long runs.
"It's quite hard to get the tyres switched on in these conditions as the surface here is very smooth, so with low temperatures it's a bit more tricky to build up the energy in the rubber; more so with the mediums but even with the super softs. It's meant to be quite warm on Sunday which is always a good thing for us, so we'll try to get the maximum from the car in qualifying tomorrow and go from there."
Mercedes
Lewis Hamilton: "Today has gone pretty well for us and I'm pleased that it dried out this afternoon so we could get some decent running in. The track is definitely not at its full potential yet but we were able to start analysing the tyres over longer runs and work on getting them up to speed for the first lap.
"The car felt pretty good today and I tried a couple of different things over the two sessions which made me feel a little more comfortable so that's positive. Hopefully it will be dry for qualifying tomorrow and we can have a strong day."
Nico Rosberg: "The first session was interesting and we learned a lot when the track was drying out. This afternoon, we wanted to learn how the new development tyre works: I had some problems warning up the fronts and also flat-spotted them on my run.
"All in all, it was a decent day, although I need to see how the long-run pace compared to the others. The track was very cool today and pretty challenging, but I felt very comfortable in both conditions. So hopefully this will be a good weekend for us again."
Sauber
Nico Hulkenberg: "It was a difficult Friday. The rain this morning didn't allow us to run through our programme as planned. It's extremely difficult to test new parts, especially the new tyre compound, in these conditions. Despite the rain that was forecast, FP2 was dry. The afternoon, however, was also difficult.
"The car felt undriveable and mid-session we found a set-up error. But even after we corrected that, we still had difficulties. I am not happy with the current set-up, we have to improve that and have quite a bit of work to do before tomorrow."
Esteban Gutierrez: "All in all we tested a lot of different set-ups today so we could find the right balance. But it's quite evident we need to find a lot more speed. We are definitely not where we want to be and we need to work as a team to improve and have a better overall speed. The track is really fun to dive on in a Formula 1 car - I like it a lot.
"You can attack the kerbs, you have the high-speed braking and it's a good challenge overall. The change of weather conditions has actually been good. It was important to gain experience on the intermediate tyres. The forecast is still unsettled, and I think we are more competitive in the wet."
Force India
Paul Di Resta: "We were quite cautious with the wet weather this morning and we only fitted the dry tyres for the last few minutes of the session. Before that I had a good run on the intermediates and felt happy with the performance - probably the most comfortable I've felt on the intermediates this year.
"So overall we didn't look too bad in the damp conditions. The afternoon was a case of getting through the dry tyre programme and trying to find the right car balance. Unfortunately things were cut short with the electrical issue, so I didn't do the long runs we had planned for the final part of the session."
Adrian Sutil: "We had lots of different track conditions today, but the car was quick in both sessions. The wet morning gave us a chance to improve our performance on the intermediates and the car felt good. In the dry this afternoon the main issue was warming up the front tyres, especially the medium tyres.
"On the supersofts there was much better grip and the long runs seemed quite competitive so it feels as though we are at our usual level here. Tonight we just need to work on making the car more consistent."
Toro Rosso
Daniel Ricciardo: "In the wet this morning, we didn't look too bad, even if you always feel you could be quicker. We seemed to be where we should in the mid field and I was pleased with the way the car went straight out of the box, so that's always good when you don't have the feeling you are going to need to create a whole new race car to be on the pace.
"In the dry in the afternoon, after my first couple of runs on the prototype and the Prime, I felt we could get more out of the car, so we made a fairly big change which I think worked in our favour. I was quite pleased with my Option run but we still have some work to do, as there is more to come. Overall, a good Friday, a good start to the weekend."
Jean-Eric Vergne: "The morning session was useful in terms of learning how the extremes and intermediates behave, as we might have more wet weather in the next two days. The car responded well in the wet. In the afternoon, we did the usual Friday job of evaluating tyres and so on. I was not so happy with the way my car was behaving, so we need to look at the data now and fix it. We seem to be roughly where we should be, so as long as we can make progress tomorrow, we can have a good weekend."
