Oil in Airbox ?

[KrashKarl]

In looking at my 944 n/a airbox to see if the filter was clean or needing replacement, I found that there is a fair bit of oil at the bottom of the airbox. I'm assuming this is blowback from the intake manifold. Does anybody know if this is a normal condition? If not, what problem might this be a symptom of? I'm new to the 944.

Thanks for any information.