oil tank removal

2001 gtx oil tank is leaking. easy to replace? does it have to be pressurized? thx!

I'm new but my 95 XP isn't. I'm trying to replace the gray fuel lines and I'm having issues separating the oil tank and the gas tank so I can pull the gas tank forward and get to all the hose connections on the tank. I don't want to damage the fitting on the bottom of the oil tank. Any great...