Formula 1’s 2026 season will bring a new power‑unit mix, but the real battle will be over the fuel that reaches the engine. The FIA’s dual‑verification system, designed to enforce 100 % sustainable fuel, is undergoing a major overhaul. Engineers will now have to prove that the fuel flowing through the flow meter meets stricter criteria, a change that could give teams a competitive edge. Advanced additives—chemicals that improve combustion efficiency—are expected to play a key role, as teams look for ways to squeeze extra power while staying within the new limits.

The shift also forces manufacturers to rethink supply chains, sourcing cleaner feedstocks and developing new blending techniques. With the 2026 regulations tightening the gap between internal combustion and electric power, the FIA’s new measurement protocols could become a decisive factor in race performance. Teams that master the science of e‑fuels and additives may find themselves ahead in the championship, while those that lag could struggle to keep pace.