Hi, I was doing my morning setups when I thought about what may cause unscheduled pit stops during races. Here are my fuel predictions data :
My first stint is 9 laps x 3.36L = 30.24L
So with a 31L stint, I'm supposed to cross the line 1 lap before with (31 - 30.24 + 3.36) = 4.12L (0.7L to 0.8L)
BUT the other prediction tells 31L = 8.7 laps, so around 3.5 to 3.6L per lap, this is 0.3/0.4L over and that is for PL1.
I also noticed I'm fine over 0.7/0.8L margin but not under and if we take a higher push into consideration (PL3 to PL5 in the final lap) we can add 0.2/0.4L and this is how the game can think we do not have enough fuel and then forces us to stop 1 lap earlier.
Sorry if that's not clear for everyone but I think devs will understand me and I hope that will help.