Originally Posted by mrmakochan
Wow I have never heard of that before.
Um, that's because he's pulling your leg.
No need to wait for a reply from Boeing. If the ferry flight can't be routed via airports within the airplane's normal range then ferry tanks are installed so it can make the necessary flight(s).
Of course, an empty airplane, with full fuel tanks, will have a significantly longer range than the same airplane with a normal load of passengers, bags and cargo.