Oil in Airbox - not overfilled

[kenzinger]

Hi all,

I discovered oil in my airbox today. All research and forum posts point to overfilling the oil tank but when I measure the oil level (warm engine, running idle, level surface), I am actually on the lower side.

For additional context, I've also been struggling with intermittent loss of power and an excessive engine shudder.

Anyone have any idea how I am getting oil in the airbox? Could worn rings and blowby cause this? I've never seen any smoke.

Thanks in advance!

[911obgyn]

According to your profile car is an 83 SC
What oil type are you running?
Is there a restrictor in your vent tube from oil tank?
CIS? Or modified?

[kenzinger]

Thanks for the response - apologies for failing to provide that context.

Stock CIS configuration.
Unsure on current oil it is running, had a shop do a quick tune up when I purchased it and was about to drive 16 hours home. I am coming up on the next oil change and will likely run with the factory spec.
Also unsure if there is a restrictor in the oil tank vent tube, is there an easy way to check?

hmm - that wasn't much extra context, apologies!