Playing SnowRunner again, this time on hard mode, which makes pretty much everything cost money, including fixing shit and refueling. It's a rather different experience where you need to plan shit out way more and mistakes are punished much more harshly, and if you are too shit you can easily hard lock your self from completing the game by running out of cash.
So I was feeling real clever when I started siphoning fuel from a giant 5k liter trailer that was part of one of the mission chains that unlocks a ton of following missions. So clever in fact that I intentionally skipped doing the mission for a while just to be able to nick fuel for free from the trailer whenever I needed to. Hell, I even got a a tanker add-on for one of the trucks to be able to ferry that shit to other regions. Imagine my horror when I finally emptied the thing and decided I'd like to deliver it now and collect my cash and reputation, as well as continue the mission chain, got it to the delivery place and it failed to register it. As it turns out, you're supposed to get the full thing delivered, not a drop missing.
I then recall that restarting a mission also resets any specific trailers related to it back to their original state, so I casually reset and still feel smug, completely failing to check the trailer itself to see if was actually refilled when it was returned to the starting location.
Turns out it doesn't, so now I gotta find 5k liters of fuel from somewhere, which is not fucking cheap :I
Edit:
And after cashing out and driving a bunch, it turns out the trailer sticks around until you complete the entire mission, and you can just empty it afterwards without any issues with completing the mission :V