The FIA has acknowledged that the Additional Development and Upgrade Opportunities (ADUO) system used in Formula 1® has certain weaknesses, but it continues to defend the accuracy of its measurements. Introduced to support manufacturers falling behind, ADUO remains a topic of debate within the paddock during the 2026 season.
The ADUO system focuses on measuring the internal combustion engine (ICE) performance rather than the entire power unit, which has led to some discrepancies and frustration among teams. Red Bull Ford Powertrains topped the first ADUO ranking, a result that surprised many and caused some dissatisfaction within Red Bull Racing’s management. Meanwhile, manufacturers like Mercedes and Ferrari are believed to have strategically limited their performance early in the season to accumulate more ADUO tokens for development.
FIA single-seater director Nikolas Tombazis has stated that while the measurements are accurate, the system itself has weaknesses and requires improvement. He suggested that future iterations of ADUO should consider the entire power unit, not just the ICE, although no specific changes have been confirmed. Honda, which currently has the largest performance deficit, supports the system as it provides development opportunities. Honda’s chief engineer Shintaro Orihara described the current ADUO allocation as fair but emphasized the need for ongoing monitoring.
The system was originally introduced as a safeguard, inspired by Honda’s previous challenges under earlier regulations. However, it has become a politically sensitive issue, with no full consensus among teams and manufacturers on how it should operate. There is also concern that some manufacturers might try to game the system by withholding upgrades or tokens to limit rivals’ progress, though Tombazis expressed doubt about the practicality of such strategies.
Red Bull Ford Powertrains’ leading position in the ADUO rankings has been a source of surprise, especially given the system’s intent to assist those lagging behind. The fact that Red Bull topped the list has added to the ongoing debate about the system’s fairness and effectiveness. Meanwhile, teams like Mercedes and Ferrari appear to be navigating the system strategically, which adds further complexity to the championship dynamics.
Despite the criticisms, the FIA maintains that the ADUO system’s measurements are reliable. The focus now is on refining the approach to better reflect the performance of the entire power unit rather than just the internal combustion engine. Honda’s positive stance highlights the system’s value in providing development chances to manufacturers facing deficits, though the broader paddock remains divided on its overall impact.
The ongoing discussions around ADUO underline the challenges of balancing technical regulations and competitive fairness in Formula 1®. The FIA’s openness about the system’s limitations suggests that further adjustments may come, but for now, the ADUO remains a key part of the sport’s regulatory framework during the 2026 season.