The maximum amount of fuel that a Formula 1 driver can use over a race distance rises from 105 kilograms to 110kg in 2019, in a move that appears to contradict the ethos that efficiency is a cornerstone of the current hybrid regulations.
For the first three years of the hybrid era the fuel limit was 100kg. Then in the build-up to 2017's big regulation changes it was realised that draggier, wide-track cars, with their high downforce levels allowing drivers to stay on the throttle longer, would impact consumption - so it was wisely decided to increase that to 105kg for '17. Despite the engine manufacturers continuing to explore the limits of efficiency that limit goes up by another five 5kg in '19.
The increase was suggested by Liberty back in April. In the aftermath of a dull Australian Grand Prix there was a renewed focus on short-term changes that could improve the show for 2019, while work continued on the big picture of '21 and a completely new package.