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Old 01-06-2009, 07:35 PM   #1
gtaccord
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WRB

Default UOA for 05 STI - German Castrol 0W-30

This is the third oil change since I have owned the car and the first oil change after switching to GC. There was only one previous owner. I bought the car with 27000 miles on it.

I made several long highway trips on this oil change but other than that just some short distance commuting and "spirited" driving.

I am looking forward to getting the next UOA to see how things turn out.

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Last edited by gtaccord; 01-10-2009 at 11:29 PM.
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Old 01-06-2009, 09:25 PM   #2
mikeythejew
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Mothballed until winter

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My report using Valvoline synpower hardly anyone here would trust in their engine.

http://forums.nasioc.com/forums/show...php?p=23773473
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Old 01-07-2009, 09:28 PM   #3
bulwnkl
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That iron's a bit high for your easy highway miles, gtaccord. I'd listen to BS and watch for a tiny coolant leak.
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Old 01-07-2009, 10:11 PM   #4
gtaccord
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Well here's the thing. The coolant was flushed at my 30k service which was ~10k miles ago. I bought the car with 27k miles on it and Subaru performed that oil change and the next one at 30k. I have no idea what oil was used in the engine before or what additives may have been used. I checked my coolant today and found no visible traces of oil. I know that this does not mean that I am completely safe but I am going to wait for my next UOA before I get too worried.
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Old 01-07-2009, 11:00 PM   #5
bulwnkl
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Yes, that's wise. No need to worry much at this point, but keep an eye on it because things aren't quite right.
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Old 01-07-2009, 11:18 PM   #6
gtaccord
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Thanks for the input.
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Old 01-07-2009, 11:21 PM   #7
unclemat
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Dinos like Mobil 5w30/10w30 and others contain ****load of sodium. If you had dino in the car previosly I bet it's due to that.

10ppm iron in 4700 miles is absolutely low value.

It's overall a STELLAR report to be envious of.
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Old 01-08-2009, 09:56 PM   #8
bluesubie
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Quote:
Originally Posted by bulwnkl View Post
Yes, that's wise. No need to worry much at this point, but keep an eye on it because things aren't quite right.
And I think I would probably do the next uoa before 6k to be safe.

-Dennis
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Old 03-27-2009, 10:34 AM   #9
gtaccord
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Default Oil analysis #2

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Old 03-27-2009, 10:47 AM   #10
unclemat
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Perfect engine & UOA.

Did you use dino oil previously, or one change before? Sodium is likely residual. Most dino oils use it as additive, particularly Mobil dinos.
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Old 03-28-2009, 11:59 AM   #11
gtaccord
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The dealership changed it before. I assume they used Mobil.
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Old 03-29-2009, 12:13 PM   #12
bluesubie
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It's a good sign that sodium and potassium both dropped but still something to watch. Castrol uses sodium as an additive in GTX, but there is very little in GC.

I actually had high sodium with my last uoa and I suspect that there was a little cross-comtamination during my turbo swap.

-Dennis
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