Fluid wagons display 0 but still show having an item

[WillTheChicken]

I've got a fluid wagon that has had its contents taken out using a pump but then when it leaves the station, it still shows it as containing to fluid but it has an amount of 0

[Loewchen]

That could simply mean it contains less than 0.1. Can you pump it out using 3 pumps? If not, post the save please.

[impetus maximus]

as long as you aren't using a fluid wagon for multiple types of fluid, it shouldn't be a problem.