Oscar Piastri faced a setback on Day 4 of the 2026 F1 preseason testing in Barcelona when his McLaren MCL40 encountered a technical issue. The Australian driver, who was a strong contender for the championship in the previous season, took to the track in the new-generation car for the first time on Thursday. However, his running was cut short due to a fuel systems problem that occurred after completing 48 laps.
In an interview with F1TV after the incident, Piastri expressed his excitement about driving the new McLaren but acknowledged the challenges that come with it. He mentioned the fuel systems issue that hampered his day and expressed confidence in the team’s ability to rectify the problem for the next day’s running.
Unlike some teams that had both drivers on track, McLaren opted for a one-driver-a-day approach in the initial days of testing. Reigning champion Lando Norris had a trouble-free day on Wednesday, completing 76 laps in the MCL40. Meanwhile, Mercedes continued to show strong performance, with Kimi Antonelli topping the timesheets on Day 4. The debut of the Aston Martin AMR26, designed by Adrian Newey, was also a highlight of the day.
McLaren’s technical director, Mark Temple, explained the team’s course of action following Piastri’s car issue. The car was stripped down to investigate the root cause of the fuel system problem, with Temple emphasizing the complexity of the car and the need for thorough analysis before resuming testing.
Piastri, eager for redemption after narrowly missing out on the championship in the previous season, faces stiff competition from Mercedes, whose power unit has proven to be both reliable and powerful. As the 2026 F1 season approaches, Piastri and McLaren will be working hard to overcome technical challenges and make a strong start to the campaign.
Overall, despite the setback in testing, Piastri remains optimistic about the season ahead and is determined to make his mark in the highly competitive world of Formula 1 racing. With the support of his team and a relentless drive to succeed, he is ready to face whatever challenges come his way on the road to championship glory.
