So i have the pistons/ rings changed with timing belt etc per the new SCA for my 2013 2.4L. the dealer said he cleaned out the PCV intake as well.
I noticed some clean oil in the clean side of the PCV.
My 2 cents
Clean oil in cleanside PCV is because ====>> your crankcase is under pressure. <<===
The pressure is escaping the crankcase via dirty side PCV and cleanside PCV --> taking oil with it.
Imagine all the carbon building up on intake valves from this oil.
This ^^^ is "normal" for this engine but it IS NOT RIGHT.
(Oil in clean air intake is also "normal" for the V6 engine)
As a preventative measure, to delay oil consumption and to make engine live longer....
I use only 100% synthetic oil and change oil at 5000 miles or when oil life monitor hits 33%, which ever comes first..
I only use premium gasoline from a "top tier" gas station, like shell, and use Techron fuel system treatment before each oil change to --> remove carbon from upper compression ring and reduce LSPI
I replaced my oil cap with a vented one, ==> that also keeps crankcase pressure at zero PSi, thus no oil in cleanside PCV.
And it prevent rear main seal failure in ice cold weather.
And By keeping the inside of crankcase at zero psi pressure,
My engine should last longer.
See Post 81.
4 choices for venting crankcase
The fc219 oil cap has a cracking pressure greater then 1.5 psi,
so crankcase will be pressure cooking crankcase gunk, watered vapor and engine oil in a 1.5 psi pressure cooker called a crankcase.
The FC219 oil cap will NOT stop oil from being pushed into clean side PCV hose since it allows crankcase to be pressurized up to its cracking pressure, which is greater then 1.5 psi
See Post 22
No air through fc 219 oil cap
A 5th choice of venting crankcase is shown in video in post 87
A home made oil cap vent connected to intake manifold.
Of course fuel trims need to be validated, especially when car is decelerating since it is unmetered air.
Did your intake valves get the carbon cleaned off of them during your major engine fix?
After all carbon build up on intakevalves is a root cause of oil consumption!??!