FIA changes regulations for 2026: new sensors and fuel flow rules to prevent manipulations
The build-up to the 2026 Formula 1 season continues, and while the storm over the Mercedes engine controversy rages on, the FIA has decided to update the regulations. The governing body has revised fuel flow management, closing potential loopholes and preventing creative interpretations by teams, in line with the switch to fully sustainable fuels.
Fuel flow: what has changed
Starting in 2026, the maximum fuel flow, previously measured by mass (100 kg/h), will be replaced with an energy-based limit of 3000 MJ/h. This change requires a more precise measurement of the energy delivered to the engine, rather than just the volume or weight of the fuel.
To ensure consistency and transparency, all cars will be equipped with a standard ultrasonic sensor supplied by Allengra. The device will provide real-time data to both the teams and the FIA, replacing the previous system that relied on two separate meters.
A technical risk identified concerns the temperature of the sensor, which could affect readings or indirectly alter the fuel’s density. The FIA has therefore updated the regulations: any device, system, or procedure aimed at changing the fuel flow sensor’s temperature is prohibited. The wording has been expanded compared to the previous version, which referred to “intentional heating or cooling,” in order to close potential regulatory loopholes.
From an engineering perspective, this change requires teams to ensure the thermal stability of the sensors under all operating conditions, without any possibility of exploiting workarounds to improve performance or efficiency.
Photos: F1
