Antonio Felix da Costa led the way on day two of the Abu Dhabi young driver test at the Yas Marina Circuit.

The Portuguese driver, who was second quickest on Tuesday for Red Bull, improved today to post a 1 minute 42.679 second lap, which put him almost half a second up on his closest rival, although it was still fractionally slower than the marker Kevin Magnussen put down yesterday in his McLaren (a 1m 42.651s).

da Costa's day was again split into sessions of aero and mechanical work, with the morning given over to aero mapping and the afternoon to tyre work as well the testing of some car components.

"It's been another good day," he summarised. "Again, we did a lot of mileage, which is good for me and for the team. On a day like this, when the conditions are perfect for testing, and with two grand's prix to go, I think the team needs to make the most of it and today I think we did that.

"It's been a great experience and I'd like to thank the whole team for their help and I hope I have been able to help them as well. I'll focus now on the future and I think most sensibly that probably means a full season in the Formula Renault 3.5 Series next year."

Oliver Turvey meanwhile was 'best of the rest', despite having to share running time with fellow McLaren tester, Gary Paffett.

Paffett ran in the morning only, with Turvey taking over in the afternoon and completing 62 tours in total.

DTM racer Edoardo Mortara came in third for Lotus, 0.242 seconds off Turvey, and he was happy with his very first outing in an F1 car: "I had a wonderful time and I'm so grateful to everyone at Lotus F1 Team for giving me this opportunity; I enjoyed every lap," he reflected. "At the same time, it was pretty tough; I've come from a car which is a lot slower and the first laps were certainly an eye opener. I improved gradually over the day and I think my progression was pretty good.

"Every time I was on track I got a little bit better. I completed the test programme scheduled by the team so it's satisfying to be able to contribute to their season. It's been one of the best days of my life."

"Edoardo spent the morning acclimatising himself to the car meaning that in the afternoon he was able to tune the set-up to his preferences," explained Lotus race engineer, Simon Rennie. "He did a great job, completing 75 laps and giving us a lot of valuable data to work with.

"We ran with new medium tyres in the afternoon meaning he was let off the leash a bit more to show his speed. At the end of the day he was third quickest, but there is more time to come from him and also the car. All in all, he did an excellent job today."

Behind, Sauber test and reserve driver, Esteban Gutierrez ended up fourth, getting his second run in the C31 after standing in for the unwell Sergio Perez in India, when the McLaren-bound racer sat out the first practice session.

"The morning session was very interesting for me because we tested a lot of different things, and I hope I gave my most precise feedback to the engineers," said Gutierrez, who did 94 laps, the most of anyone runner.

"After being in the car so recently in India, of course, I feel a lot more confident in handling all the system like KERS and DRS. In the morning session I used only hard tyres, but in the afternoon I certainly enjoyed running the medium as well as the soft compound."

"Again Esteban did a good and reliable job for us. We basically ticked off everything from today's job list," added Giampaolo Dall'Ara, Sauber's head of track engineering, "In the morning and early afternoon the focus was on aero work with a set up change over the lunch break.

"Later in the afternoon we repeated the programme we did yesterday with Robin [Frijns], giving Esteban a set of medium compound tyres as well as a set of softs. In the end he did a high fuel run on medium tyres. For tomorrow we have some brake testing and suspension work on the list."

Further back, Paffett was fifth on the timesheets, one spot ahead of Johnny Cecotto Jr, who was making his debut with Toro Rosso.

"First of all, I would like to say thank you to Toro Rosso for having given me this opportunity. It's great to be back in a F1 car after having tested here in Abu Dhabi last year and to add some more kilometres under my belt," Cecotto Jr stated.

"The day went very well and I enjoyed working with the team. The level of professionalism, number of systems on the car and the amount of people working in the team always impresses me. It was also nice to have driven a Ferrari engine, a name which is like a piece of history."

Giedo van der Garde was the only other runner on track and he again brought up the rear for Caterham, although he did shave around eight tenths off his best time from Tuesday.

"It's been a great couple of days here in Abu Dhabi," said the Dutchman. "Today we ran considerably more laps than on day one. We spent the morning running through more aero work and ran with a number of different setups that give the team a huge amount of data to work through that will be really useful for the last two races of the season.

"In the afternoon we switched to longer runs, looking at tyre management and how the car behaves on different fuel loads and I'm pleased with the progress we made. Towards the end of the session we put soft tyres on and I had a couple of runs that were closer to the performance runs we do in FP3 - the car had more fuel than in quali but I'm pretty happy with where I ended up.

"Next up for me is FP1 in Brazil, another track that'll be new for me but with the time I've had on track here, and in the other FP1s I've done this year, I think that'll be a good session for me. I'm not doing FP1 in Austin as the team needs maximum time on track for the race drivers, but I'll be going to the race as Reserve Driver and I'm really looking forward to getting out there - it's going to be a great week for sure."

The Abu Dhabi young driver test now concludes on Thursday, with da Costa set to hand over the Red Bull RB8 to Formula Renault 3.5 Series winner Robin Frijns, who ran for Sauber on Tuesday. Luiz Razia is also due back on track for Scuderia Toro Rosso, while Gutierrez will do a second day for Sauber. At Caterham and Lotus, Alexander Rossi and Davide Valsecchi will wrap up running respectively for those two squads, while McLaren continue with Turvey in the morning and then give Magnussen another go in the afternoon.