It's a long story but I actually drove over 3 sectors one night in (can't remember which) either a Panzer or an Ostie with 25% fuel and showed no signs of running out. This was a couple of years ago.
[EDIT]: OK, I don't know what I was thinking. My own Jeep can go 400 miles on a tank of fuel or 100 on a quarter. Imagine if you drove a vehicle 4 sectors and ran out of fuel before you got where you were going. The ultimate in frustration. Retract that request.