• REPORT: Next Stop, Australia!

The sun has officially set on pre-season testing for the 2018 Formula One season - eight long days, 1,040 laps and one snowman later, now it's time to get back to racing!

Friday's running was the last chance for teams to prepare for the season-opening Australian Grand Prix, and they certainly made the most of it.

Like many of our rivals, we wrapped up pre-season testing with our busiest day. The Mercedes-AMG F1 W09 EQ Power+ clocking an impressive 201 laps of the Circuit de Barcelona-Catalunya.

In total, our latest F1 creation managed 1,040 laps across the eight days of testing - equivalent to 4,841 kilometres and over 15 Spanish Grand Prix race distances.

We continued the trend of splitting our drivers, something that has been particularly fruitful each day. Lewis Hamilton drove the car in the morning, with Valtteri Bottas concluding our test programme.

With testing out of the way, the hard work doesn't stop. There's plenty of data to delve into and lots more to discover about the W09 before the team heads off to Australia.

'It's difficult to know where we are'

Lewis was first to drive the W09 on Friday, focusing his attention on race simulations and racking up 97 laps during his final stint in the car before the season officially begins.

His best time of 1:19.464 may have left him in 11th on the leaderboard, but the Brit wasn't going for lap times and his was set early in the morning on the Supersoft tyre.

In total, the four-time World Champion left Spain with 456 laps under his belt in the new car.

"It's been a really positive test," Lewis explained. "We got through everything, reliability has been great. Everyone has been working their backsides off and doing a tremendous job, I'm really proud of the team. We're happy with the information that we've got.

"Both the car and the track are a lot faster compared to last year's race here. In my last run during the race simulation today I was doing 1:19s - that's my qualifying lap time from 2017 every lap.

"It's still difficult to know exactly where we are in comparison to Red Bull and Ferrari and we won't fully know that until we get to the first race.

"But I feel like we've got as much information as we could in order to equip us with the best data to go to the season opener. The preparation has been really good in the time that we had."

'The team has done a great job'

Valtteri bookended our pre-season testing - the first to head out in the W09 on day one of running and the last to drive the car on the eighth and final day.

It was another productive day behind the wheel for the Finn, as he got his head down and worked through a programme focused on gathering tyre data.

He ended the day sixth on the leaderboard with a best lap of 1:18.825 on the Medium tyre, putting in 104 laps during his afternoon out on track - bringing his total for testing to 585 laps.

"Today was a very good ending to testing," Valtteri said. "As a team we completed more than 200 laps and I put in more than 100 laps in the afternoon.

"So that's very positive and I'm very happy with the progress. Now we need to keep working for the week and a half before we travel to Melbourne. It will be interesting to find out where we will be.

"We got the Medium and the Hard tyres to work quite well. I think we still have issues with blistering on the softer compounds. Hopefully it will be different in Melbourne, but on the new track surface here in Barcelona we had some difficulties.

"The team has done a great job over the past two weeks. I really enjoy working with the team and I can't wait to get racing."

Result: 2018 Pre-Season Test 2 - Day 4

Pos Driver Team Laps Time
1 Kimi Räikkönen (7) Ferrari 157 1:17.221
2 Fernando Alonso (14) McLaren 93 1:17.784
3 Carlos Sainz (55) Renault 45 1:18.092
4 Daniel Ricciardo (3) Red Bull 92 1:18.327
5 Romain Grosjean (8) Haas 181 1:18.412
6 Valtteri Bottas (77) Mercedes-AMG Petronas Motorsport 104 1:18.825
7 Brendon Hartley (28) Toro Rosso 156 1:18.949
8 Esteban Ocon (31) Force India 163 1:18.967
9 Charles Leclerc (16) Sauber 75 1:19.118
10 Sergey Sirotkin (35) Williams 105 1:19.189
11 Lewis Hamilton (44) Mercedes-AMG Petronas Motorsport 97 1:19.464
12 Lance Stroll (18) Williams 27 1:19.954