Race 10, 20, 30, 40 or 50 laps, at Oval with fo8, pitstop required.

My friend takes over half way. I'm very very sure Ive set enough fuel: it's always: amount of laps x 1.5 + 1 extra. (Unless you have a good drafter but thats another story)

Friend takes over and have to pit at aprox 80% of his part because fuel is gone


Funny is: sometimes I can reproduce and sometimes I can't.

What's going here ?