The UFO has a high speed and no gas cost. It is unique in that it is the only vehicle that can be driven without any Gas supplies present.
The UFO can however, still break down via normal means and will require a party member with maximum Mechanical skill to repair.
Only a party member with maximum mechanical will be able to repair the UFO, however it will still have a chance to fail. If the UFO does end up being fixed the increase in Repair Value to 7 ensures that it can only be repaired once.