The governing body of Formula 1 FIA has officially hit the green light on emergency regulation tweaks designed to prevent the new Honda-Aston Martin partnership from becoming a permanent backmarker. With reports suggesting Honda’s 2026 power unit is lagging more than 10% behind the field’s benchmark, the FIA has now activated a revamped version of the Additional Development and Upgrade Opportunities (ADUO) mechanism to keep the competition alive.
What is the new F1 engine rule update ahead of Canadian Grand Prix?
The core of this week’s announcement is a major expansion of the ADUO ‘safety net.’ Originally, the rules only accounted for manufacturers trailing by up to 8%, but the FIA has now added a new category for those who are more than 10% away from the best performer.
For Honda, this is a massive win. Under this new tier, they have been granted an extra 230 hours of test bench time (up from the previous 190-hour cap). Perhaps more importantly, the financial regulations have also been adjusted to allow a $11 million downward adjustment in the cost cap. This allows Honda to spend more on R&D without the fear of a financial penalty.
Honda and Aston Martin gets a lifeline
The timing of these rule changes is also tied to a reshuffled 2026 calendar. Due to the earlier cancellations of the Bahrain and Saudi Arabian Grands Prix, the FIA has modified the ADUO evaluation periods.
🚨 The FIA updated the ADUO regulations 🚨
• Period 1 is now races 1-5
• Period 2 is now races 6-11
• Period 3 is now races 12-18
• There’s also a new category to help engine manufacturers who are more than 10% behindHave to wonder if the last change was to help Honda. pic.twitter.com/D6lUJimsk4
— Daniel Valente 🏎️ (@F1GuyDan) May 8, 2026
