What is ADUO? How F1's engine catch-up system works, and became political

The FIA is yet to officially reveal which Formula 1 manufacturers qualify for additional help developing their internal combustion engines. But news emerged over the Monaco weekend that Red Bull is surprisingly leading the field in V6 performance and all other OEMs, including Mercedes, qualify for an additional upgrade.
As part of the ADUO system (Additional Development and Upgrade ...Keep reading