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Assuming that your AOS is working (max of 5 inches or water steady vacuum at the oil filler cap), you are always going to find the hose from the AOS to the intake coated in oil, that is simply a fact of life. Adding a catch can will only coat that as well.
The AOS is designed to reduce the amount of liquid oil pulled into the intake system, but not to eliminate it completely. The problem is that oil is being transferred as vapor when the engine is running hot, and that vapor accumulates on everything it touches. That also happens with the motor sport version as well.
If you are smoking badly at the track, and the AOS is working properly, the problem lies elsewhere, as in the AOS system pulling liquid oil out of the cam covers.
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“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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