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PCV Oil Catch Can weirdness with new oil... #4713862
04/02/18 07:34 AM
04/02/18 07:34 AM
Joined: Dec 2016
Posts: 590
E. Tennessee
WhizkidTN Offline OP
WhizkidTN  Offline OP

Joined: Dec 2016
Posts: 590
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] (79K)
>EDGE 0W-40, Fram XG9688
Her's: '14 Nissan Rogue SL AWD - 2.5L NA (81K)
>EDGE 0W-20, Fram XG6607
Re: PCV Oil Catch Can weirdness with new oil... [Re: WhizkidTN] #4713868
04/02/18 07:43 AM
04/02/18 07:43 AM
Joined: Dec 2017
Posts: 99
Maryland
malibuguy79 Offline
malibuguy79  Offline

Joined: Dec 2017
Posts: 99
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, 84 Bonneville street/strip car
She has 18 Fit and 01 Forester
Re: PCV Oil Catch Can weirdness with new oil... [Re: WhizkidTN] #4713995
04/02/18 10:15 AM
04/02/18 10:15 AM
Joined: Oct 2014
Posts: 13,324
Canyon County Idaho
CT8 Offline
CT8  Offline

Joined: Oct 2014
Posts: 13,324
Canyon County Idaho
The crankcase id filled with oil mist when the engine is running. NOACK is inconsequential in this .


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: PCV Oil Catch Can weirdness with new oil... [Re: WhizkidTN] #4714069
04/02/18 11:53 AM
04/02/18 11:53 AM
Joined: Sep 2015
Posts: 6,179
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline

Joined: Sep 2015
Posts: 6,179
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.
Re: PCV Oil Catch Can weirdness with new oil... [Re: CT8] #4714077
04/02/18 12:06 PM
04/02/18 12:06 PM
Joined: Jul 2005
Posts: 31,714
NY
demarpaint Offline
demarpaint  Offline

Joined: Jul 2005
Posts: 31,714
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

Re: PCV Oil Catch Can weirdness with new oil... [Re: demarpaint] #4714261
04/02/18 03:50 PM
04/02/18 03:50 PM
Joined: Oct 2014
Posts: 13,324
Canyon County Idaho
CT8 Offline
CT8  Offline

Joined: Oct 2014
Posts: 13,324
Canyon County 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 .


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: PCV Oil Catch Can weirdness with new oil... [Re: WhizkidTN] #4714868
04/03/18 08:11 AM
04/03/18 08:11 AM
Joined: Dec 2016
Posts: 590
E. Tennessee
WhizkidTN Offline OP
WhizkidTN  Offline OP

Joined: Dec 2016
Posts: 590
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] (79K)
>EDGE 0W-40, Fram XG9688
Her's: '14 Nissan Rogue SL AWD - 2.5L NA (81K)
>EDGE 0W-20, Fram XG6607
Re: PCV Oil Catch Can weirdness with new oil... [Re: CT8] #4715149
04/03/18 12:42 PM
04/03/18 12:42 PM
Joined: Jul 2005
Posts: 31,714
NY
demarpaint Offline
demarpaint  Offline

Joined: Jul 2005
Posts: 31,714
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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