Sergio Perez believes it will be "a difficult season for everyone" as Formula One adapts to new engine regulations.

On his first day in the Force India, Perez only managed to complete 11 laps as the team started learning about the new V6 turbo engines and all its ancillaries. While Wednesday saw the team increasing its mileage, speaking after his opening day in the car Perez believes it will be tough going all year and expects teams to only find out weaknesses in car performance in the second and third tests.

"I don't want to judge the level of downforce we have right now - especially with this temperature we have - but it does feel very low, a bit scary," Perez said. "I didn't manage to get the tyres up to temperature, the brakes or anything on the limit, but right now it did feel really difficult to drive.

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"There are so many issues, but I expect things to get a lot better for Bahrain, which will be a lot more realistic to the race. We have seen in the past that with these [low] temperatures it's been difficult, so when we get to Melbourne I think Bahrain will be a great reference for us. But I think it's going to be a difficult season for everyone out there to understand and to maximise everything. So it's very important the work that we do - Nico [Hulkenberg] and myself - with the team to get as race prepared as possible for Melbourne."

Making his track debut for Force India after his move from McLaren, Perez also said he feels the team is making good progress in its preparations for the new F1 season.

"It's quite different, every team is very different. I've been in three teams in Formula One and every team is a very different world. All I can say is I'm comfortable here at Force India and I think we're working in the right direction. There are so many things that we have to get on top of to understand the difficult engine, how it works and everything, all the energy and the systems. It's just quite complicated to understand first of all, but also to maximise the system is going to be crucial, especially for the first couple of races."