Jenson Button has faith that McLaren-Honda will get it right before the end of this season, believing race wins could even be on the cards.
Following a relatively successful day of testing at the Barcelona circuit on Friday with Fernando Alonso behind wheel, Button had hoped for mileage when he stepped into the car on Saturday.
That, though, was not to be.
The British racer's MP4-30 broke down after 12 laps – a loss of power – and, back up and running in the afternoon, again stopped out on track leaving Button with just 24 laps to his tally.
McLaren confirmed it was yet again an issue with a seal on Honda MGU-K that would yet again need to be redesigned.
But despite the ongoing woes, Button is confident the team will get it right in time.
"We are not in for another tough season – that is definitely not the case – but whether we are ready for the first race or not I can't say right now," he told reporters.
"This is a very different situation to the last two years – the last two years we just weren’t quick enough, whereas now this is all very new for us.
"It would be a very different situation if this was last year, I don’t think I would be sat here answering the same questions because most people would be in the same position.
"Everyone else has so much experience with these power units, whereas Honda obviously doesn’t. So it looks worse than it is, I would love to be pounding around every day that we have the car, but it is just not the case right now.
"There are problems which we need to solve and hope that the next test will be a good test for us in terms of mileage so that we feel confident going to the first race that we can get the best out of what we have and push the car to the limit."
In fact such is Button's confidence in the McLaren-Honda partnership that he believes they could be fighting for race wins come the end of the season.
"We are not going to have a race-winning car at the first race, but we might have one at the last race.
"I think you are going to see big improvements from us, we are all quite interested to see what this car can do because I think it has a lot of potential, but it is just very difficult to extract."