Hey guys, just recently (500~mi ago) installed a catch can on my boosted 5.3...today i checked the can and it was nearly half full of thin creme/coffee colored oil. Is this normal??? Or is something wrong?

 

I wouldnt think it would be full in that short time. If you live in a humid place, i can see moisture getting in there, you especially see that on motors in humid places that dont drive enough to burn off the moisture out of the engine. Hows the dip stick look?

 

Dipstick looks fine! I cant speak for the humidity lately, but we've had tons of snow and ice. I keep my truck in a non climate controlled garage, so the truck was pretty cold when I checked it his morning. Ill try to check it after i drive 45min to work this evening. See if the milky crap is gone! I did notice it had a slight gasoline smell to it. I run 9psi at mid-11's afr at wot. Im starting to question running 9psi on it considering all the problems gm had with oil consumption/pistons and rings had in these late model 5.3's.

 

Another possibility is that i dont have it hooked up right for a boosted app??? I just took the inlet to the dr side rear of valve cover and the outlet to the barb on the inlet of the blower where maggie instructed the original pcv hose went. Should I have used a check valve?

 

I checked it after driving 50mi and still warm, there was probably a teaspoon in there that looked like coffee with creamer but it was slightly thicker this time...

 

I get that same mix in my catch can, stock lc9 5.3. I usually only get that kind of mix in the winter, I think it's condensation. In the summer it's only oil. But, I don't get nearly that much. I get 2-3 Tbsp in 1000-1500 miles or 2 months for me.
My last dump:

 

It's condensation. I originally had my catch can mounted right next to the headlight to keep it cool hoping it would catch more stuff, but it would fill with the creme colored yogurt-like stuff that would clog the catch can's drain. It would do this really quickly too. So I moved it next to the alternator and now it only catches oil.

 

humid climate, short trips, not getting oil hot.

probably have it under neath the valve covers too

 

This is me, everyday, since my drive to work is so short. Mine is mounted to brake booster.

 

mine is mounted between the alternator and the coolant reservoir for the maggie. I installed a check valve between the can and intake today just for good measure.