F1 leaders Mercedes granted engine upgrades, none for Red Bull

LONDON, Aug 26 : Mercedes will be allowed engine upgrades, despite leading both Formula One championships by a considerable margin, after the governing FIA concluded that Red Bull - fourth overall and without a win in 2026 - had the strongest power unit.The FIA published findings of its Additional Development and Upgrade Opportunities (ADUO) mechanism on Wednesday and said Mercedes could make one additional engine homologation in 2026 and another in 2027, with corresponding cost cap and dyno testing increases.ADUO grants Formula One power unit manufacturers additional upgrades if the performance of their internal combustion engine (ICE) falls at least 2 per cent below the sport's best-performing one across defined review periods.The first review period ended after the Canadian Grand Prix i