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-   -   UOA Worry... (http://legacygt.com/forums/showthread.php?t=193427)

Austin2334 09-21-2012 04:25 PM

UOA Worry...
 
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I just got my UOA back from Blackstones and wondering what you guys may think or ideas.

This oil change was done at the dealership and supplied my own oil. I am not 100% sure on how the sample was exactly taken.

Info: 11 LGT w/ 20k miles, I have used Rotella T6 5w40 for 10k with OEM filters, no mods beside exhaust, never driven hard, 70% city driving.

Austin2334 09-21-2012 04:42 PM

Also, I've been looking around about newer subarus and higher copper levels and came across this info...

"Our cars have a copper lined oil cooler which seems to keep copper readings higher than, say, WRXs. I've gone through 3 OCIs with T6 and just finally got my wear metals in the "normal" range, and that's after 20k miles." -2012 STI

"Here's what Dave at RedLine had to say:

"The copper level is higher than I might expect, though not likely a bearing as lead and tin would also be elevated. The copper is likely from an oxide inside an oil cooler or an over plate on a cam shaft, either way nothing to be concerned about.
I don’t recall seeing oil analysis specifically from this low mileage STi.

More: "In a new cooler the copper would tend to have a fresh non passivated surface, the oil will tend to react with that copper oxide, appearing initially as higher levels in oil analysis tapering off over time."

TheOneDoubleN 09-21-2012 04:55 PM

It sounds like you answered your own question in that it's nothing you should be worried about.

Austin2334 09-21-2012 04:59 PM

That is what I'm hoping but I haven't found the 10+ LGT having an oil cooler...

TheOneDoubleN 09-21-2012 05:09 PM

Regardless, you have such low mileage, I doubt it's anything you need to concern yourself with. UOA's seem to cause more paranoia than anything useful, from what I've observed here over the years.

Types4 09-21-2012 06:57 PM

They have an oil to water cooler. Water being engine coolant which helps get the oil to operating temps quicker as well as cool it down if it gets too hot.

Your oil filter actually screws onto the oil cooler.

hmmrdwn 09-21-2012 08:27 PM

Run another one in 5,000 miles.

Austin2334 09-21-2012 09:34 PM

I am going to continue Rotella and change again in 3k and get another UOA. Also, do my own service this time and pull the sample mid-stream. Correct?

Austin2334 09-21-2012 10:42 PM

Looks like my oil cooler info wasn't correct. Only the 08+ STi have oil coolers. Wrx and LGT do not have that setup.

GTTuner 09-22-2012 06:25 AM

Quote:

Originally Posted by TheOneDoubleN (Post 4082091)
Regardless, you have such low mileage, I doubt it's anything you need to concern yourself with. UOA's seem to cause more paranoia than anything useful, from what I've observed here over the years.


Plus 1 !!!!!!!

hmmrdwn 09-22-2012 06:35 AM

Quote:

Originally Posted by Austin2334 (Post 4082325)
I am going to continue Rotella and change again in 3k and get another UOA. Also, do my own service this time and pull the sample mid-stream. Correct?

Sounds great, but why not try a different oil? The local Subaru dealer uses Rotella and my buddy that is the service tech says it's the cheapest oil the dealer can find. I tried to research Rotella and find its basically a cheap commercial oil. Maybe someone can find more accurate info than that.

I had a bad oil analysis at 31K and it predicted a seal going bad in a garrett turbo that ended up being a production run problem. I don't know about the copper issue, mine was iron.

Austin2334 09-22-2012 09:12 AM

I don't want to get into a huge "what's the best oil thread" but what could be like one or two "better" oils I should try?

Rutchard 09-22-2012 09:34 AM

Quote:

Originally Posted by Austin2334 (Post 4082362)
Looks like my oil cooler info wasn't correct. Only the 08+ STi have oil coolers. Wrx and LGT do not have that setup.

Like Type4 said before, there is an oil cooler on your LGT, the oil filter screws into it.

Austin2334 09-22-2012 09:57 AM

^^ I looked through OEM parts and didnt see the oil cooler but after finding some pics I can see the oil cooler.

Thanks everyone for the reassurance! Ill chalk it up as oxidization of the copper lining inside the oil cooler

hmmrdwn 09-22-2012 08:14 PM

Quote:

Originally Posted by Austin2334 (Post 4082600)
I don't want to get into a huge "what's the best oil thread" but what could be like one or two "better" oils I should try?

T6 isn't bad, I'd just suggest trying pennzoil platinum, castrol syntec edge or even mobil 1. Oil formulations have additive packages the may help you possible problem.


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