Thin coating of oil in air filter elbow

[Robti]

Hi changing my air filter and cleaning the throttle and I have a thin coating of engine oil in the rubber elbow from the air filter box to the throttle body, I assume this is coming from the breather at the throttle body.

Anything to be concerned about, it must have been doing it for years as even though it thin it's been there for a while ?

Thanks

Robert

[Anon3]

I saw the same on my 40k motor and wasn't at all concerned.
I just gave it a wipe.