Further Improvement and Improve Alternatives (ADUO) is a mechanism inside the 2026 Method 1 Technical Rules (Article C4) permitting Energy Unit producers whose Inside Combustion Engine (ICE) efficiency falls not less than 2% under the best-performing ICE throughout outlined assessment durations to introduce further homologated upgrades to their Energy Unit through the present and following season, but in addition to learn from further Value Cap and dyno testing allowances. The extent of ADUO is calculated over three durations in every season, with the extent of allowance decided by the dimensions of the efficiency hole to the main ICE. The primary assessment interval was concluded after the Canadian Grand Prix and the second assessment interval concluded after the Hungarian Grand Prix.
The FIA can affirm that the outcomes of the primary and second ADUO evaluation interval of 2026 have been communicated to all Energy Unit producers.
For the primary interval:
- Mercedes had been decided to be within the 2-4% window, and can thus be allowed one further homologation in 2026 and an extra one in 2027, along with corresponding value cap and dyno testing will increase.
- Audi, Ferrari and Honda had been decided to be above 4%, and can thus be allowed 2 further homologations in 2026 and a pair of in 2027, along with corresponding value cap and dyno testing will increase.
For the second interval, no further homologations had been granted to any of the Energy Unit Producers.
Because of the confidential nature of this info, no additional particulars on Energy Unit efficiency index measurements shall be communicated.
Nikolas Tombazis, FIA Director of Single Seater, stated: “The FIA has undertaken thorough and exhaustive evaluation as a part of our ADUO assessment course of. With the discharge of the findings of interval 2, we’re assured that, based mostly on the standard of the info, its evaluation is extremely sturdy, giving us a excessive degree of confidence in our findings. We additionally must respect the confidentiality and mental property of the groups and their Energy Unit Producers in disseminating any particulars from the findings.
“That is the primary yr of ADUO so naturally there are areas which we might evolve over time, in dialogue with all of the PU Producers”
The third ADUO assessment interval of 2026 will cowl races 12-18 (Netherlands to Mexico Metropolis).
ENDS
Be aware to editors: Extra details about ADUO could be discovered here.
