Since the upcoming update is bringing the refuelling ban, I suggest you to separate Tyre Push Level from Fuel Push Level. Otherwise, there will be no point of this refuelling ban..
I mean let's say on a race of 54 laps, you put enough fuel for 54 laps on medium push level. But after the race starts you notice that it is so cold, which means you should set the push level to level 5, but if you do so you will run out of fuel way before the race ends. And if you leave it on the medium push level, then your tyres will be super cold and that will make you much slower.