Water in oil but not what you think!

[toypwr]

I have a 2005 Aveo that is collecting moisture in the valve cover and beige oil sludge in the oil fill cap. Originally it was thought to be from short runs and not allowing the engine to completly warm up. It will do the same thing on a long run with a fresh oil change. It never loses coolant or oil and the coolant stays clean. Replaced the PCV valve because it seems like it's not pulling the condensation out and burning it like it should. Vacuum line to the PCV is clear also along with the one going to the air cleaner hose near the MAP sensor. Just did the timing belt, water pump, idler pully, thermostat and A/C compressor. Cannot figure out if it's an emissions problem or vacuum although it idles fine. Has anyone got any clues as what else to check. I'm about 99.9% sure it's not the head gasket because the coolant is stable. Help???

[goodtimes12]

I know this is old. But maybe it’ll help someone.
I was having an issue with poor idle(drops to 300-400RPMs) and intermittent multiple random misfire at higher acceleration (flashing check engine light, no codes)

I decided to clean the EGR, replace spark plugs, and replace valve cover gasket(small leak into spark plug well)

While removing the valve cover, there is a hose, which connects to the right back of the valve cover, there was a yellow goop, like water and oil mixed. But nothing ever in the oil changes or coolant.
I cleaned this as well as the channel in the valve cover that leads to the PCV

After doing these things the car runs much better. Not sure which one of these did the trick.
But I am wondering if it was that goop not allowing the crank case to vent properly.

I never followed where that hose goes. But photos online seem to show it leads to the crank case to allow oil vent.
When I have time, I want to remove this hose completely and clean it.