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Old 03-27-2008, 08:43 PM   #1
foxboroxt
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Member#: 73104
Join Date: Oct 2004
Chapter/Region: NESIC
Location: Mansfield, MA
Vehicle:
2003 WRX wagon stg2
2011 Outback

Default UOA: 2003 WRX 150k Castrol Syntec

I'm not sure how to post pdf, but fortunately, it's not too exciting. I've been seeing gold flakes in my oil for a while now, so I was a bit nervous about sending my first sample to Blackstone. My lead was 15 compared to the average of 5, but I was pretty pleased with the rest of the numbers. I've posted a long report of my car up to 150k in the General forum. Basically, I drive it pretty hard, it's been in a front end accident, the drivetrain is original stock, and I run Castrol Syntec 5w or 10w30. I was thinking of having a compression test done, but considering my oil report would it be a waste of time?

This oil had been in the car for about 6,000 miles, and I added a quart somewhere around 4k.

We are seeing your 2003 Subaru for the first time, and it is often hard to see what is happening with your engine from only one sample. Comparing your wear to universal averages, yours are slightly higher, but that is likely due to the longer oil run. Universal average are based on a ~4,700 mile oil use. The high lead, however, could be bearing wear or it may be a particle streak. If it's the latter, then it should improve next time. The low viscosity wasn't due to any significant fuel dilution so it's not a major concern. Change this oil and check back in ~5,000 miles.
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Old 03-27-2008, 09:41 PM   #2
bluesubie
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04 FXT

Lightbulb

I definitely would not run N. American Syntec 5 or 10W30 longer than 5,000 miles. Yep, you'll need another uoa to establish a trend. I think 15 ppm lead is "caution light" at this point, but I would put something thicker in there like Syntec 0W30 (aka GC) if you haven't already.

If you can't post the pdf, you can just type the report.

Use this to get started:

Aluminum
Chromium
Iron
Copper
Lead
Tin
Molybdenum
Nickel
Maganese
Silver
Titanium
Potassium
Boron
Silicon
Sodium
Calcium
Magnesium
Phosphorous
Zinc
Barium

Properties
SUS Viscosity @ 210F:
Flashpoint:
Fuel %:
Antifreeze:
Water:
Insolubules:

-Dennis
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Old 03-28-2008, 01:38 AM   #3
foxboroxt
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2003 WRX wagon stg2
2011 Outback

Default

Thanks for the start. Like I said, I can see gold flakes, so I know there is some bearing wear. Hopefully the numbers don't increase much with my next UOA.




Second set is the average values.


Aluminum 4 3
Chromium 1 1
Iron 13 8
Copper 5 5
Lead 15 5
Tin 1 1
Molybdenum 99 72
Nickel 1 0
Maganese 0 1
Silver 0 0
Titanium 0 0
Potassium 0 1
Boron 31 66
Silicon 6 9
Sodium 4 7
Calcium 3025 2397
Magnesium 16 109
Phosphorous 699 722
Zinc 775 860
Barium 0 0

Properties
SUS Viscosity @ 210F: 58.8 59-65
Flashpoint: 420 <375
Fuel %: <0.5 <2.0
Antifreeze: 0 0
Water: 0 0
Insolubules: 0.3 <0.6
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Old 03-28-2008, 10:07 AM   #4
bluesubie
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Default

Now I recall another bugeye owner that had high lead. He switched to a 40 weight oil and nothing changed in two OCI's. I don't know what happened since I don't think he's posted any more uoa's. I think his lead was much higher though.

Hopefully it's just a particle streak and will improve [crosses fingers]. Blackstone says low viscosity, but this oil starts with a low viscosity of 9.7 cst's anyway. 9.3 is the minimum for a 30 weight.
Castrol USA Product Data Sheet pdf .
Do they list your visocisty at 100C at around 9.8?

Excellent Silicon. What air filter? Did you replace this with Syntec 5W30?

-Dennis
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Old 03-30-2008, 11:48 PM   #5
foxboroxt
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2011 Outback

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Quote:
Originally Posted by bluesubie View Post
Now I recall another bugeye owner that had high lead. He switched to a 40 weight oil and nothing changed in two OCI's. I don't know what happened since I don't think he's posted any more uoa's. I think his lead was much higher though.

Hopefully it's just a particle streak and will improve [crosses fingers]. Blackstone says low viscosity, but this oil starts with a low viscosity of 9.7 cst's anyway. 9.3 is the minimum for a 30 weight.
Castrol USA Product Data Sheet pdf .
Do they list your visocisty at 100C at around 9.8?

Excellent Silicon. What air filter? Did you replace this with Syntec 5W30?

-Dennis
You are a psychic, the viscosity at 100C was 9.88.

My filter is a KN that I have had for about 140k. I usually clean it every oil change (6k).

I've used 5w most of the time, but just recently starting putting in the 10w just due to availability.

It would be nice to see some UOA's around the time of bearing failure. Maybe I'll have to take a look around the Blackstone site.
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Old 03-31-2008, 09:13 AM   #6
bluesubie
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04 FXT

Default

I'm not a psychic, I just used a sus to cst conversion calculator.
http://neptune.spacebears.com/cars/stories/margins.html

I wonder if dirt that may have gotten past the K&N would have caused a particle streak. If so, I guess that silicon would be higher.
If lead doesn't come down, you might want to get a more in depth analysis from someone like Dyson Analysis .

I have yet to see a uoa at the time of bearing failure. I do recall seeing one with normal wear for a couple of OCI's for some time prior to a failure. In that case I would guess that it was one catastophic event instead of prolonged bearing wear.

Where's Mr. bulwnkl?

-Dennis
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