Thanks for your company and contributions today.

Andrew Benson's report will be on the website very soon.

Please join us again tomorrow. The final day of pre-season testing 2015 starts at 08:00 GMT.

1. Lewis Hamilton (Mercedes) 1:23.022 (76)

2. Felipe Massa (Williams) 1:23.262 (102)

3. Kimi Raikkonen (Ferrari) 1:23.276 (136)

4. Carlos Sainz (Toro Rosso) 1:24.191 (132)

5. Romain Grosjean (Lotus) 1:24.200 (116)

6. Marcus Ericsson (Sauber) 1:24.477 (123)

7. Nico Hulkenberg (Force India) 1:24.939 (158)

8. Kevin Magnussen (McLaren) 1:25.225 (39)

9. Daniel Ricciardo (Red Bull) 1:25.742 (128)

You can stick a fork in this day of testing. We are all done.

One more day to come tomorrow and then attention can finally turn to the opening race of the season in Australia in a fortnight.

Full times coming up.

"Lewis Hamilton, who has done 76 laps, and Kevin Magnussen, who did 39, are the only two drivers not to complete over 100 laps today."

Carlos Sainz, moments after posting his best time of the day, slows to a halt at turn three.

As before lunch, we have a few drivers out there on the super-softs looking for some Hollywood times.

Carlos Sainz is one of those in the Toro Rosso, going fourth with a 1:24.191.

Lotus' Romain Grosjean is up to fifth after a 1:24.200 on the same tyre.

"Honda F1 boss Yasuhisa Arai and McLaren racing director Eric Boullier have just finished a media briefing, following the curtailment of their day's running with an oil leak. Boullier said the situation was 'not so negative or disappointing' because 'we were not expecting to cover 100 laps every day'.

"As for the Australian Grand Prix in two weeks' time, Boullier said: 'We won't be as ready as we'd like but we will do our best.'"

Ericsson's car is taken away and we're off again.

Marcus Ericsson has stopped his Sauber at turn three.

We're asking which car you think is the looker of 2015.

Dan White: "It's got to be the Mercedes.... Looks a little like the 2006 McLaren from the front, with its thin nose section."

anthony wyatt: "Force India or Sauber. Can't make me mind up. That's an OAP for you."

Charles Crook: "Of the current lot the black and white Red Bull is the best looking, even if its just a temporary paint job."

Androsid: "Force India is one #beautifulbeast"

Of course, the discussion via #bbcf1 quickly turned to classics of the past, with the Jordan 191, Benetton B194, Arrows A20 and the JPS Lotus all getting shout outs.

Jo Lantru even suggested the stunning motor below. I'm not sure we can accept this one though.

As we enter the final hour the gloves come off and Lewis Hamilton immediately jumps the Mercedes to the top of the pile.

On the soft tyre, the world champion does a 1:23.022, two-tenths faster than the previous best today by Felipe Massa, which don't forget was a lap done on the super-soft Pirelli.

Image source, Getty Images

Sadly we've not had too much in the way of tumbling lap times to report with the teams switching to longer runs since lunch.

Still, here's where we're at. The times have not change much since the break but note the number of laps piled on.

1. Felipe Massa (Williams) 1:23.262 (102 laps)

2. Kimi Raikkonen (Ferrari) 1:23.276 (125)

3. Lewis Hamilton (Mercedes) 1:23.648 (61)

4. Marcus Ericsson (Sauber) 1:24.477 (103)

5. Nico Hulkenberg (Force India) 1:24.939 (143)

6. Kevin Magnussen (McLaren) 1:25.225 (39)

7. Daniel Ricciardo (Red Bull) 1:25.742 (111)

8. Romain Grosjean (Lotus) 1:27.950 (105)

9. Carlos Sainz (Toro Rosso) 1:26.330 (121)

Williams tweet:, external "And that's day [three] finished for us and @MassaFelipe19's winter test programme completed. Next stop Melbourne."

Well not quite. Bottas has to have another go tomorrow.

Kevin Magnussen on Twitter:, external "Great to be back in the car today. The #McLarenHonda feels great! Plenty more to come from this one. Thanks for all the support today guys!"

Toro Rosso tweet:, external "And this is what happens when you take your helmet off after 121 laps!! @carlosainz #HelmetHair"

Image source, Toro Rosso

Did I mention that I like the look of the new Sauber C34? Because I do. Very much. Nice shade of blue.

In fact, the wholesale winter rhinoplasty undertaken on those hideous 2014 noses has resulted in a rather handsome bunch of F1 cars.

Let me know your favourite of the new breed using #bbcf1.

Image source, Getty Images

McLaren tweet:, external "An oil leak has stopped play, so that's a wrap for today. We'll be back tomorrow for more #F1Testing."

Andrew Benson
Chief F1 writer

"Oh dear. Just when things were suddenly looking up for McLaren, they hit another problem.

"After Jenson Button completed 101 laps on Friday and Kevin Magnussen another 38 this morning with no issues, it was beginning to look as if they might - just might - have got over the hill on the reliability front.

"But after the eagle-eyed Ben Edwards spotted that Magnussen's car had been wheeled back into the garage trailing fluid, the team have now called it a day.

"That fluid was oil, from a leak. McLaren now have just eight hours' running to sort themselves out before first practice at the Australian Grand Prix."

Ben Edwards' mince pies didn't fail him.

There was indeed a leak on the McLaren. Oil to be precise.

Game over after just 39 laps. Tough on Kevin Magnussen.

Now that Mercedes are back up and running the wooden spoon for laps completed has passed to McLaren.

Kevin Magnussen has done just one lap since lunch, moving his tally to 39. The 100 laps done by Jenson Button yesterday does not look in danger of being emulated.

Worth remembering, of course, that BBC commentator Ben Edwards reported a fluid leak on the MP4-30 earlier (see 13:36).

Image source, Getty Images