It's legendary that bus owners are afraid they are going to run out of fuel...which incidentally in a big bus is pretty bad news, as it is quite an operation to reprime the system.

Of course, the easy solution is to keep plenty of fuel on board anyway.

On most Prevost coaches there is a tiny little connection near the fuel tank, should be inside the bay--and not usually even noted in the Prevost manuals--the idea being, put a bit of fuel in the tank, put some air to the valve and it reprimes the system.

Nice bit of trivia to pull on another owner if you have the chance.