I'm going to oil bathe this shimano nexus 7.. the proffesional bike repair person I asked to do this for me sprayed wd40 in it, €80 later I decided to just buy
Rear wheels with Shimano Nexus hub gearing
How to fit Shimano Nexus 7 Nexus 8 hub & Inter-M Roller Brake rear wheel Dutch Bike - YouTube
How To Remove a Shimano Nexus 7 Nexus 8 Hub and Inter-M Roller Brake Rear Wheel - YouTube
Shimano Nexus 7 Speed Wheel Set with Shifter
Dahon/Tern 7 Speed Rear Wheel (Shimano Nexus Inter 7 Hub gear 32H) Black/Silver - C H WHITE & SON