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#4713862 - 04/02/18 07:34 AM PCV Oil Catch Can weirdness with new oil...
WhizkidTN Offline


Registered: 12/05/16
Posts: 492
Loc: E. Tennessee
Ok, I've come across something I think is good but weird at the same time.

I've had both PCV and Intake OCCs (Saikou Michi brand) installed for several years now on my SX and loved the way they work. I drain them (never anything on the Intake side, it is always been the PCV side that has fluid) at every oil change. In the winter, you tend to get more water due to cooler temperatures. I would get about 1~2 oz of oily/watery fluid (smelled like gas as well) in the PCV can for every 5K mile driven (my daily driver). That was when I was running M1 0W-40 oil.

I switched to Castrol Edge 0W-40 oil and gotten some better UOA (by Polaris) a while back. At my last OCI this weekend (my third on Castrol), I found basically NO fluids in my OCCs! Only a few drops. I also cleaned mine out with Throttle Body Cleaner just to be sure I had nothing getting fouled up and it was fine. Keep in mind that this GDI turbo engine is very hard on any oil used and this engine normally gets lots of fuel dilution in the oil.

I know that Castrol has a lower NOACK value from the M1 oil I was running, but only thing I can summarize is that I'm getting much less blow-by with the Castrol edge and therefore far less is getting collected in the OCCs. I'll continue to watch it. Car runs strong, never uses oil and has no issues all through this oil brand change (over maybe a years time-frame).

Very strange but I think GOOD news! Thought I'd pass it along.
_________________________
His: '12 Kia Optima SX - 2.0L GDI Twin-Scroll Turbo [Tuned] (72K)
>EDGE 0W-40, Fram XG9688
Her's: '14 Nissan Rogue SL AWD - 2.5L NA (66K)
>EDGE 0W-20, Fram XG6607

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#4713868 - 04/02/18 07:43 AM Re: PCV Oil Catch Can weirdness with new oil... [Re: WhizkidTN]
malibuguy79 Offline


Registered: 12/11/17
Posts: 86
Loc: Maryland
Intresting.

I get a little bit of nastyness in mine on my turbo tercel after a few weeks on ST. same catch can BTW
_________________________
Greg...the exhaust guy
I have a 10 Yaris, 97 Tercel 1nzfe swap coming, 82 Malibu 1uzfe swap in progress
She has 18 Fit and 01 Forester

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#4713995 - 04/02/18 10:15 AM Re: PCV Oil Catch Can weirdness with new oil... [Re: WhizkidTN]
CT8 Offline


Registered: 10/09/14
Posts: 11230
Loc: Idaho
The crankcase id filled with oil mist when the engine is running. NOACK is inconsequential in this .
_________________________
"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf

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#4714069 - 04/02/18 11:53 AM Re: PCV Oil Catch Can weirdness with new oil... [Re: WhizkidTN]
BrocLuno Offline


Registered: 09/06/15
Posts: 5617
Loc: Kalifornia Kollective
Nice - good on you. Some oils work better in some situations ... smile
_________________________
Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.

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#4714077 - 04/02/18 12:06 PM Re: PCV Oil Catch Can weirdness with new oil... [Re: CT8]
demarpaint Offline


Registered: 07/03/05
Posts: 30008
Loc: NY
Originally Posted By: CT8
The crankcase id filled with oil mist when the engine is running. NOACK is inconsequential in this .


Isn't a lower NOACK oil going to produce less "oil mist?" If so that would support the OP's observation.
_________________________
God Bless Our Troops


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#4714261 - 04/02/18 03:50 PM Re: PCV Oil Catch Can weirdness with new oil... [Re: demarpaint]
CT8 Offline


Registered: 10/09/14
Posts: 11230
Loc: Idaho
Originally Posted By: demarpaint
Originally Posted By: CT8
The crankcase id filled with oil mist when the engine is running. NOACK is inconsequential in this .


Isn't a lower NOACK oil going to produce less "oil mist?" If so that would support the OP's observation.
Noack is oil thickening? The pistons and cylinders etc are lube by oil flinging off of the con rods and crankshaft windage. Depending on the engine the cams and also the rocker arms cams etc splash/fling oil .
_________________________
"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf

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#4714868 - 04/03/18 08:11 AM Re: PCV Oil Catch Can weirdness with new oil... [Re: WhizkidTN]
WhizkidTN Offline


Registered: 12/05/16
Posts: 492
Loc: E. Tennessee
FWIW: I should note that with this latest oil change (I do keep it to ~4K miles for my OCI), that I didn't notice as much of a gas smell in the old oil as I might have in the past - but that is very subjective! Again, not really sure what that may mean in the context of what I found with the OCCs, but it is interesting. This weekend, I'll double the PCV valve itself to make sure it is clear and working just to make sure that system if functioning as expected.
_________________________
His: '12 Kia Optima SX - 2.0L GDI Twin-Scroll Turbo [Tuned] (72K)
>EDGE 0W-40, Fram XG9688
Her's: '14 Nissan Rogue SL AWD - 2.5L NA (66K)
>EDGE 0W-20, Fram XG6607

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#4715149 - 04/03/18 12:42 PM Re: PCV Oil Catch Can weirdness with new oil... [Re: CT8]
demarpaint Offline


Registered: 07/03/05
Posts: 30008
Loc: NY
Originally Posted By: CT8
Originally Posted By: demarpaint
Originally Posted By: CT8
The crankcase id filled with oil mist when the engine is running. NOACK is inconsequential in this .


Isn't a lower NOACK oil going to produce less "oil mist?" If so that would support the OP's observation.
Noack is oil thickening? The pistons and cylinders etc are lube by oil flinging off of the con rods and crankshaft windage. Depending on the engine the cams and also the rocker arms cams etc splash/fling oil .


I thought it was evaporation loss from heat, and oil thickening as a result, which would back the OP's statement.
_________________________
God Bless Our Troops


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