Had a wet race in US. Was largely being shown 2.1L each lap at PL4. Had the right amount of fuel in the car for 2.1 each lap with only a few laps when I could go 2.2. So was checking every lap and 2.1 is being shown. But then all of a sudden I'll be running out of fuel before the end, and it's too late to do anything about it.
Even though I was maintaining 2.1 on nearly every lap with different (lower) PLs, and the display is confirming 2.1L, the distance I'm running out at is getting further an further away. So still 2.2 being taken at times when I'm being told different.
I've asked before why this happens and was told that the fuel goes to more than one decimal place - well that's fine but can we at least see this so we can manage our fuel more precisely? Happens too often imo.