F1 | Mercedes faces urgent fuel challenge ahead of 2026 season
Mercedes, considered a favorite for the 2026 Formula 1 season, could encounter significant challenges even before the championship begins. A new paddock report shines a spotlight on the fuel front amid the 2026 technical revolution. According to Roberto Chinchero for Motorsport.com Italia, Petronas is engaged in a race against time to secure certification for the sustainable fuel that will be used by Mercedes-powered teams in the upcoming F1 World Championship.
New rules, more complex process
Until 2025, the verification process for fossil-based fuels was relatively straightforward: manufacturers would send a sample to a UK laboratory accredited by the FIA, and within two to three weeks they would receive confirmation of compliance with technical regulations.
With the introduction of sustainable fuels, however, the procedure has changed dramatically. The FIA has entrusted certification to an external body, the UK-based Zemo Partnership, which does not only analyze the final product but examines the entire production chain.
From this year onward, checks cover every stage of the process, including on-site inspections at production facilities, analysis of certifications for individual molecules, and audits of partners involved in the supply chain. This more rigorous system is designed to protect the credibility of one of the key pillars of the 2026 regulations.
Possibility of “provisional” fuel in Melbourne
Such a complex procedure inevitably requires more time, especially in the first season of implementation. Delays in certification, potentially linked to the technical partners involved, cannot be ruled out.
Currently, there have been no official statements. However, if the final fuel blend is not certified in time for Melbourne, Mercedes’ customer teams—McLaren, Williams, and Alpine—could be forced to use a provisional fuel.
The regulations allow teams to race with a blend composed solely of previously certified components if a specific element has not yet received approval. At present, it is impossible to predict exactly what strategy Petronas will adopt if final certification does not arrive before the Australian Grand Prix.
For Mercedes, the stakes are incredibly high. Relying on a provisional fuel blend rather than the optimized 2026 mixture could lead to a measurable drop in performance, potentially handing an early advantage to rivals Ferrari or Red Bull. As the countdown to Australia continues, the pressure on the laboratories at Petronas has never been higher, making the battle for fuel certification just as critical as the aerodynamic development happening in the wind tunnels.
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