The levers for seatpost and handpost clamp, and for the telescopic handlepost clamp on my Mu P8 have become very stiff and squeal when closing the clamp. After seeing a post on the Dahon forums, I decided to apply a drop of oil to the clamp screw threads and to the surface of the cams and presto, it's much easier to fold/unfold my bike.
I'm curious as to why those parts of the bike weren't lubed in the first place when new. Is lubing those parts of my bike a bad idea?

TIA

Johno