Toto Wolff, the head of Mercedes, has called on the FIA to implement rules that prevent engine upgrades from altering the current Formula 1 pecking order. The new power unit regulations for the 2026 season include a performance-balancing measure, allowing manufacturers that are behind the leader by a certain margin to develop their engines. The regulations provide for three periods of Additional Development and Upgrade Opportunities (ADUO) during the season, with those two per cent behind the top manufacturer eligible for development opportunities.
The FIA is expected to provide more clarity on the rules ahead of the Miami Grand Prix. Wolff stated that the ADUO principle was to allow underperforming teams to catch up, not overtake. He emphasized that the FIA must ensure transparency and precision in their decisions to avoid affecting the championship.
With Mercedes dominating the early stages of the season, their self-manufactured engine is likely to be the benchmark for other teams to catch up with. However, Wolff suggested that only Honda, which supplies Aston Martin, needs assistance.
He expressed concern that ADUO decisions could interfere with the competitive order, but believes the FIA will protect the sport's integrity. The Miami Grand Prix will take place on May 1-3, with the season's second Sprint weekend live on Sky Sports F1.