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Old 01-20-2012, 10:06 PM   #1
Mind
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Default UOA: 2008 STI Pennzoil Platinum 5w-30

2008 STI, ~4,000 mile interval, 42,500 total miles on car. Cobb AP Stage 1 OTS. PA Fall/Winter, all street driving. First UOA with the car - this was my 2nd fill of PP (previous fill went about 4k miles also).



Concerned with the copper - from what they wrote and what I've been able to search on the internet I'll probably need another UOA to determine if there's an issue. Could be bearing, turbo or oil cooler? Everything else looks normal except for sodium. Comments?
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Old 01-21-2012, 10:14 AM   #2
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I've had elevated copper on a UOA before too (08 STI with RT6 @ 3750 miles OCI, some time ago when I had 20-25K miles).

I've read here or elsewhere that the consensus is the elevated copper read on Blackstone UOAs from GR STIs is related to the oil cooler and not a concern.
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Old 01-21-2012, 05:13 PM   #3
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Thanks for the input. Did your copper fall back to normal levels with other oil changes? I'm thinking since the car seems perfectly healthy otherwise (no burning oil, no odd noises, seems to run smoothly and pulls strong, very good mpg) that it is just the oil cooler.
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Old 01-22-2012, 12:57 PM   #4
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Not unusual to see a copper spike with turboed Subarus. I don't see any cause for concern. Oil has sheared down to a heavy 20 weight.
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Old 01-22-2012, 05:11 PM   #5
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The chemistry in some oils interact differently with the oil cooler and copper may be reduced by trying different oil. I agree, no reason for concern about the copper with this 20 weight IMO.

-Dennis
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Old 01-22-2012, 05:48 PM   #6
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Quote:
Originally Posted by bluesubie View Post
The chemistry in some oils interact differently with the oil cooler and copper may be reduced by trying different oil. I agree, no reason for concern about the copper with this 20 weight IMO.

-Dennis
Hmmm... okay I'll bite... what do you see that is of concern?
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Old 01-22-2012, 10:43 PM   #7
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Just that the oil sheared to a 20 grade which is not unusual for any interval on a Resource Conserving oil.

-Dennis
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Old 01-23-2012, 07:50 PM   #8
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Here is a comparison between T6 and Pennzoil Platinum and Ultra.
The most recent one is the T6. Both oils did really good...


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Old 01-23-2012, 09:46 PM   #9
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You have one 30 grade uoa that maintained its viscosity, and holy smokes, what the heck were you running at the 9,500 mile uoa? That oil is actually thinner than virgin Mobil1 5W-20.
http://www.mobil.com/USA-English/Lub...l_1_5W-20.aspx

It's funny that a lot of Forester owner's with the new FB engine refuse to run 0W-20, but in fact many people have been running oil with an operating viscosity of a 20 grade for years. If your fuel dilution continues, expect the Flashpoint and viscosity to take another hit on your current fill of PP. Be cautious about taking Blackstone's advice and running to 7,500 miles, IMO, although you would be covered under warranty.

-Dennis
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Old 01-24-2012, 12:40 AM   #10
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Not my UOA ^^^ and I change the oil every 4k miles.

Where did you see 9,500 miles?
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Old 01-24-2012, 10:23 AM   #11
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Quote:
Originally Posted by Mind View Post
Thanks for the input. Did your copper fall back to normal levels with other oil changes? I'm thinking since the car seems perfectly healthy otherwise (no burning oil, no odd noises, seems to run smoothly and pulls strong, very good mpg) that it is just the oil cooler.
Haven't checked it again.
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Old 01-24-2012, 12:12 PM   #12
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Quote:
Originally Posted by bluesubie View Post
You have one 30 grade uoa that maintained its viscosity, and holy smokes, what the heck were you running at the 9,500 mile uoa? That oil is actually thinner than virgin Mobil1 5W-20........-Dennis
On two of my UOAs I have seen P-Platinum 5W30 shear down to a vis of 8.7, once after only 1480 miles and once after 2400 miles. Fuel in both cases was <0.5.

Last edited by SubLGT; 01-24-2012 at 12:29 PM.
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Old 01-24-2012, 06:26 PM   #13
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Quote:
Originally Posted by G_REX View Post
Not my UOA ^^^ and I change the oil every 4k miles.

Where did you see 9,500 miles?
The uoa from January 2011.

-Dennis
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Old 04-05-2012, 10:07 AM   #14
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Another one on PP 5w30. Copper still high but dropping. Running RT6 currently.

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Old 04-05-2012, 10:59 PM   #15
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Quote:
Originally Posted by Mind
Another one on PP 5w30. Copper still high but dropping. Running RT6 currently.
It will be interesting to see if copper drops further with RT6. Different oils seem to produce different copper levels (possibly from the oil cooler). I wonder what this would have looked like pushed to 7,500 miles? Lead is zero though so that's a good sign for bearing wear. Unless the wear particles are just too large to be picked up by uoa. j/k.

-Dennis
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Old 04-05-2012, 11:34 PM   #16
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Yeah, I've been hunting out PP STI UOA's to see if there was any correlation with PP and copper, but didn't really find anything - actually found some PP STI UOA that had very low copper. I was running Synpower prior to the first run of PP (first UOA) and I think the elevated sodium could have been due to the Synpower as I've heard it is high in Sodium. Or at least I think I read that somewhere.

Looks like on the Oil Analyzers FAQ they have this:

Quote:
Q: My sample has a high copper number. Where is it coming from?

A: If only the copper is high, but no other metals such as lead, tin, or aluminum are elevated, it is mostly an oxide of copper from the oil cooler. As the oil cooler is exposed to the heat from the engine oil, it can sometimes oxidize the copper, which will show up in the analysis report. This is considered a normal condition and no corrective action is required. This process usually will taper off or stop occurring over time.
So that made me feel a little better since other metals are low/within limits. But I do wonder about the silver too.

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j/k.
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Old 04-06-2012, 08:57 AM   #17
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Have you seen gathermewool's uoa's? Some silver noise as well. http://www.iwsti.com/forums/2-5-lite...o-0w-30-a.html
Stop running girly man oil! Oh, you've already switched.

-Dennis
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Old 04-06-2012, 08:07 PM   #18
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all of these 5w30 lemmings
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Old 01-07-2013, 11:17 PM   #19
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Quote:
Originally Posted by Uncle Scotty View Post
all of these 5w30 lemmings
some of us don't want to risk voiding our warranty....
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Old 01-11-2013, 04:35 PM   #20
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Quote:
Originally Posted by feet2017 View Post
some of us don't want to risk voiding our warranty....
You would not risk your warranty by running a 5W-40 such as T6. Read that owners manual. It has a range of viscosities up in there.
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Old 01-11-2013, 04:47 PM   #21
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Quote:
Originally Posted by bluesubie View Post
The uoa from January 2011.

-Dennis
Just saw this old post; that is my UOA. The first one was run with PP 5w30, ran Pennzoil Ultra 5w30 after that. Starting with the 21,800 change, I filled up using T6 5w40 and haven't looked back since...
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Old 01-19-2013, 04:44 PM   #22
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from the TSB



Quote:
SUBARU GENUINE ENGINE OIL SYSTEM FLUSH
TECHNICAL SERVICE BULLETIN
Reference Number(s): 02-110-10, Date of Issue: January 5, 2011
INTRODUCTION
The purpose of this bulletin is to announce a new product that is now available through the Subaru Genuine
Chemical Program, "Subaru Engine Oil System Flush".
The main cause of turbocharger failure is lack of lubrication due to insufficient maintenance. Currently,
2010MY and prior turbocharged engines require that the oil and filter be changed every 3,750 miles (6,000 km)
or 3 3/4 months. All 2011MY turbocharged engines require that the oil and filter be changed every 7,500 miles
(12,000 km) or 7.5 months.
Proper oil change maintenance is critical to the lubrication of engine components, especially in turbocharged
engines. When engine oil maintenance is not performed at required intervals, oil gelling (sludge) and deposits
caused by deterioration of the oil will clog oil passages, causing excessive wear from lack of lubrication. If the
mesh filter screen located inside the banjo bolt that secures the turbocharger oil supply pipe to the back of the
right cylinder head becomes clogged, the turbocharger will fail. In addition, this will also cause damage to the
Active Valve Control System (AVCS). As a reference, refer to Service Bulletin 02-106-08R,
TURBOCHARGER MESH FILTER SCREEN .
SYNTHETIC OIL
Subaru
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Old 01-19-2013, 11:57 PM   #23
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Quote:
Originally Posted by feet2017 View Post
some of us don't want to risk voiding our warranty....

some of you dont wanna risk being stupid.....er....doing stupid things
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