Thanks Peter!
Oil was changed in January or February. Ordered in the two jug offer (of cleaning oil and oil) from Bike24 so I am good for quite a while. Also have extra drain plugs but since I have a Loctite analog (German brand but not Loctite) I don't think I will need them for now.
Am disappointed to find out from this site that the KMC chain lube is a secret formula. I am really in awe of how all the rustling from the earlier chain has gone away. Wonder if it is some sort of nasal sebum? hehehe