Oscar Piastri‘s initial run in McLaren’s 2026 Formula 1 car was cut short due to a mechanical problem during the pre-season shakedown in Barcelona on Thursday night (AEDT). After completing 48 laps in the MCL40, the team discovered a fuel system fault during the lunch break, forcing an extended investigation that sidelined Piastri for the remainder of the day’s testing.
Details of the fuel system problem amid complex regulations
Pre-season testing is critical this year as teams adjust to significant regulatory changes in Formula 1’s technical framework. McLaren’s technical director Mark Temple explained that the day’s issue reinforced the importance of these early trials. The team chose to bring the car back to the garage and disassemble it thoroughly to pinpoint the exact cause of the fuel system failure. This approach prioritized a full understanding of the problem to avoid similar setbacks during the season opener.
“It’s just about learning and getting to know (the car), and then as we get more time, we’ll look to try and tweak or tune the car,”
Mark Temple, Technical Director, McLaren
“Of course, it’s a shame we could not run in the afternoon as every minute of track time is precious at such an early stage of the season … the car is very complex, so we decided to bring the car back into the garage and strip it down to fully understand where the problem is coming from.”
Mark Temple, Technical Director, McLaren
Piastri remains optimistic despite the challenge
Despite the early disruption, Piastri regarded the day as constructive and valuable for his acclimatization to the new car and regulations. The 21-year-old Australian emphasized how different the cars feel compared to those of previous years and expressed eagerness to continue adapting. He and his world champion teammate, Lando Norris, are slated to share driving duties on the final day of testing on Friday night (AEDT), after Norris took the first laps in the MCL40 on Wednesday night.
“It was nice to be back out today, especially in the new car. There’s a lot of challenges this year up and down the grid, so it was good to get stuck in,”
Oscar Piastri, McLaren Driver
“We had a fuel system issue, which cut our day short, but the team’s working hard to get that fixed and back out (Friday). These cars are completely different to what we’ve had the last few years. That’s part of what this test is about.”
Oscar Piastri, McLaren Driver
“We’ve already identified a few things that we can try to improve on the car to make it feel a bit nicer.”
Oscar Piastri, McLaren Driver
“We’ll continue to get used to the car and get a good read on how different things feel. Then we’ll find a good direction to make the car quicker and feel nicer.”
Oscar Piastri, McLaren Driver
Pre-season testing under strict conditions at Barcelona
The ongoing five-day pre-season shakedown in Barcelona is held behind closed doors, with no outside media or photographers allowed, and each team limited to running on three days. McLaren skipped the first two days to focus on preparing their car. This initial run marks Piastri’s first significant track time in the MCL40, making the mechanical issue a reminder of the challenges involved in developing a car under brand new regulations.
Lewis Hamilton’s positive start with Ferrari and Mercedes’ pace
Meanwhile, seven-time world champion Lewis Hamilton tested Ferrari’s 2026 contender, completing 85 laps in the morning session, which he described as an encouraging start amid a new regulatory landscape. Hamilton’s previous season was notably difficult, ending without a single grand prix podium. His comments highlighted a cautious optimism about Ferrari’s progress as testing moves forward.
“When you come to the test you always want to get a lot of mileage (and) today I did 85 laps in the morning which is amazing,”
Lewis Hamilton, Ferrari Driver
“Last year we had a worse start to testing. So this, considering it’s a completely new band of rules, it’s better than we’ve experienced in the past. I’m really hopeful that continues.”
Lewis Hamilton, Ferrari Driver
Mercedes has displayed strong reliability during the Barcelona test, with George Russell setting the fastest lap so far at 1:16.3.
Looking ahead to Bahrain and the 2026 Formula 1 season opener
After the Barcelona shakedown, teams will converge on Bahrain for two official pre-season tests, which will be fully open to media coverage and broadcast live. These sessions will provide further opportunities to resolve technical issues and refine setups before the season-opening Australian Grand Prix in Melbourne on March 8. For McLaren and Oscar Piastri, the priority will be to overcome the fuel system difficulties swiftly and build momentum as the new season approaches.
