Hey Blutengel,
I had a quick Google and came across this page.
It basically describes the ‘grand tour’ of the shutter mechanism.
http://www.hof-bleckeder-moor.de/fotomuseum/seagull-reparatur.htm
It also mentions the oil.
But there’s nothing like that at FOTOIMPEX. I’ve bought myself a “range of lubricants”.
Micro-Tools has a decent selection.
Good luck
Gert