It's been a while since I played the game and it's prequel
Soldiers of WW2 There's three options:
> As mentioned try getting a soldier to pick up a fuel barrel and pour it directly into the tank
> Get a fuel can and siphon petrol from another vehicle - pouring the full can into the tank
> Abandon the vehicle and - if possible - seize & repair an enemy vehicle using a toolkit
Check your tank / tank leaders inventory for a
fuel can Or inside enemy tanks / enemy tank commander bodies using the examine feature.
It's all a bit fiddly managing ammo & fuel but that's the
Men of War series for you!
The
context icons give you an idea of what will happen.