My drivers side seatbelt has recently started squeaking. It wouldn't bother me as much except the squeak is happening close to my ear so I can't ignore. Is there anyway to oil this part etc...

Mine did the same thing. Pull the seat belt out all the way and hold it while you shoot some WD-40 in there. Not too much, just a couple of short sprays. Make sure the plastic extension tube is on the can also. HTH.