Is it normal for the injector o rings to the intake manifold to be oily? I have a catch can ....

 

Do you see it from outside with injectors in place or you removed injectors and see that insulators are oily inside?maybe mechanic or you spilled a little oil when changing motor oil or maybe your dip stick popped out.

 

i'd guess any of the PCV/catch can could be leaking. just a quick guess, off top of my head. and it's a free check LOL

 

Outside, about to replace them now.