ADUO Operational and Financial Measures and Eligibility Criteria
Article 4.3
ADUO Operational and Financial Measures and Eligibility Criteria
Chapter: APPENDIX C5: HOMOLOGATION AND DEVELOPMENT OF POWER UNITS, FUEL AND OIL FOR 2026-2030
In Simple Terms
This rule gives struggling power unit manufacturers extra development opportunities to catch up. If a manufacturer's engine is 2-4% slower than the best engine, they get 1 extra upgrade per season for two seasons. If they're 4% or more behind, they get 2 extra upgrades per season instead. These upgrades are one-time grants and don't stack within the same season.
- ADUO (Aid to Disadvantaged Users of Older power units) provides extra homologation upgrades for manufacturers falling behind on performance
- Eligibility is based on ICE Performance Index: 2-4% gap = 1 upgrade per season; 4%+ gap = 2 upgrades per season
- Upgrades are granted for two consecutive seasons (N and N+1) but don't accumulate within a single season
- Manufacturers must also reduce their Cost Cap spending downward when receiving these benefits
Official FIA Text
At the end of each of the ADUO periods specified above, every PU Manufacturer granted ADUO may implement further upgrades to their homologated Power Unit (as described in Article 3.3 of this Appendix), extend the usage of their Power Unit Test Benches for Restricted Testing (as described in Article F5.2.7) and must make a downward adjustment for Cost Cap purposes (pursuant to Article 4.1(t) of the Power Unit Financial Regulations). a. PU Manufacturers whose ICE Performance Index is at least 2% but less than 4% below the best-performing ICE will be eligible for: i 1 additional homologation upgrade in season N ii 1 additional homologation upgrade in season N+1 b. PU Manufacturers whose ICE Performance Index is at least 4% below the best-performing ICE will be eligible for: i 2 additional homologation upgrades in season N ii 2 additional homologation upgrades in season N+1 ADUO homologation upgrades are not cumulative within a season and will only be granted following the first occasion that the PU Manufacturer is assessed by the FIA as eligible for ADUO according to the criteria in this Article. [The proposed 2% threshold and subsequent resolution of the ICE performance index will be validated or adjusted after conclusion of the ongoing activities between PU Manufacturers and F1 Teams related to the on-track ICE performance measurement]