Regarding the VOC's, I don't think a catch can is collecting those on an appreciable scale. All of the compounds you referenced are in a gas form at the temperatures you'll find in an engine bay. And these vapors (and VOC's) are exactly what gets passed back into the intake air for...
This statement is true for catch cans. For the IAG AOS, it's an air-oil separator. It separates the oil out of the crankcase vapors and sends the clean(er)air along through the system. The clean oil then is allowed to go back into the engine, where it belongs.
You spoke earlier about 'funk and...
