968s sucking oil into engine somehow???

[Jake Raby]

As I had stated this exact set of symptoms can mean other mechanical issues are present causing the problem..

It's pretty simple, the intake should be dry of oil inside. If it is not, then the hypothesis of the AOS could be correct. There is no such thing as am AOS being "overcome". The only way that oil can make it past the AOS is if the internal diaphragms/ membrane has failed.

A manometer is the proper tool to test an AOS. Look for oil in the intake and test using a manometer. If the intake is dry and the AOS tests good, then you have oil entering the combustion chamber or exhaust port and being burned.

You can even have a bad oil control ring causing the issue. This can happen in corners as G forces push more oil to that side of the engine and puts the oil control rings through a workout.

A bad oil ring can have perfect leak down and compression test numbers and can even have better results than he other cylinders. Why? Because the extra oil provides a better ring seal for the compression rings.

This one can be tough to diagnose correctly. I see 2-3 of them per year.