Originally Posted by ourmefa
Where is the fuel tank located and how big is it?
Depends on the bus builder and what the original agency ordered. If you take the VIN to your friendly neighborhood bus dealer's service department, they can get you a *lot* of information about that specific chassis, through the coachwork's build sheet.
As for tank location- on an RE, it will probably be between the frame rails. On an FE or convention, outboard of the frame rails, probably up near the driver's seat, but not necessarily. I've seen conventions with the tank on the curb-side