Racing
© Jonathan Borba
The FIA will make its first ADUO decision after the Canadian Grand Prix, when it determines which 2026 Formula 1 power-unit manufacturers are at least 2% behind the leading internal combustion engine and therefore qualify for extra development support.
That first ruling matters because ADUO, short for Additional Development and Upgrade Opportunities, is the new relief mechanism built into the 2026 engine rules for suppliers that fall short of the benchmark. Once the FIA completes its review, eligible manufacturers must be informed no later than two weeks after Montreal, and any extra upgrade allowance can be used from the following race.
Nikolas Tombazis, the FIA's single-seater director, has moved to lower expectations before that process begins. “It’s important to make clear that ADUO is not a kind of balance of performance mechanism,” Tombazis said. “A team or manufacturer will not suddenly get greater fuel flow rate or more or less ballast.” He added that a manufacturer “will still need to make the best engine in order to win” because “it’s not a magic bullet.”
That is the FIA's central point as the system is activated for the first time. ADUO is designed to give struggling manufacturers more room to respond, not to wipe out a deficit by regulation. The first monitoring window had originally been due to end after Miami, which was the sixth race on the original calendar, but the cancellations of the Bahrain and Saudi Arabian Grands Prix forced a revision. The opening review now covers Australia, China, Japan, Miami and Canada.
The most immediate question is who falls into the system. Honda is identified in the source material as currently below the performance reference, while Ferrari, Red Bull Powertrains-Ford and Audi are also being assessed or debated for possible inclusion. If any of them are confirmed to be 2% or more down on the best ICE, they would become eligible for added development freedom, but not for an instant competitive reset.
Tombazis has described the biggest practical gain as financial relief under the cost cap. Manufacturers that are 2% to 4% behind can receive up to USD $3.0 million in extra development margin. That rises through the deficit bands to as much as USD $11 million per period for a manufacturer 10% or more behind. In 2026 only, a manufacturer in that highest band can also bring forward up to USD $8 million from future budget periods for development work.
ADUO also brings extra homologation opportunities depending on the size of the gap. A manufacturer between 2% and 4% down can receive one additional upgrade in the current season and one in the following season, while a deficit of at least 4% opens the door to two in the current year and two more in the next. The significance of the Canadian review, then, is not that the FIA is about to equalize the field, but that it is about to identify who starts the new engine era already chasing and how much room they will get to recover.