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New 18 STI Factory fill UOA 1,300 mi #4517965
09/16/17 04:26 PM
09/16/17 04:26 PM
Joined: Dec 2006
Posts: 134
Cincinnati
Spdfrk1990 Offline OP
Spdfrk1990  Offline OP
Joined: Dec 2006
Posts: 134
Cincinnati
This is the first UOA I have ever done but I plan to do them often now.


Last edited by Spdfrk1990; 09/16/17 04:31 PM.

18 Chevrolet Colorado Z71 4x4 V6 | Mobil 1 5w30 EP
18 KIA Stinger GT AWD Limited Edition Sunset Yellow
Re: New 18 STI Factory fill UOA 1,300 mi [Re: Spdfrk1990] #4517970
09/16/17 04:36 PM
09/16/17 04:36 PM
Joined: Feb 2008
Posts: 1,058
MA.
Camprunner Offline
Camprunner  Offline
Joined: Feb 2008
Posts: 1,058
MA.
Holy Molybdenum!

Re: New 18 STI Factory fill UOA 1,300 mi [Re: Camprunner] #4517982
09/16/17 04:45 PM
09/16/17 04:45 PM
Joined: Dec 2006
Posts: 134
Cincinnati
Spdfrk1990 Offline OP
Spdfrk1990  Offline OP
Joined: Dec 2006
Posts: 134
Cincinnati
Do you think that is from the engine build or they put it in the factory fill oil? I wonder if I should have kept it in longer? Most like to do the first change around 1k miles or so.

I am also running Castrol Edge 5w30 now.

Last edited by Spdfrk1990; 09/16/17 04:49 PM.

18 Chevrolet Colorado Z71 4x4 V6 | Mobil 1 5w30 EP
18 KIA Stinger GT AWD Limited Edition Sunset Yellow
Re: New 18 STI Factory fill UOA 1,300 mi [Re: Spdfrk1990] #4517995
09/16/17 04:58 PM
09/16/17 04:58 PM
Joined: Feb 2008
Posts: 1,058
MA.
Camprunner Offline
Camprunner  Offline
Joined: Feb 2008
Posts: 1,058
MA.
I am the wrong guy to ask on assembly lube but I do like to dump factory fill early. However I always run a quality conventional oil for about 4,000 miles on my first oil change before switching to a synthetic oil. Yes prob old school but every car or truck I have ever had did not use any oil for most of there life 2-350,000 miles.

Re: New 18 STI Factory fill UOA 1,300 mi [Re: Camprunner] #4517997
09/16/17 05:01 PM
09/16/17 05:01 PM
Joined: Sep 2009
Posts: 16,002
OH
fdcg27 Offline
fdcg27  Offline
Joined: Sep 2009
Posts: 16,002
OH
Holy moly is right!
Whether this came from the FF oil, the assembly lube or moly coated pistons is probably immaterial.
Subaru knows that the moly content of the FF is high and intends that it be so.
Subarus typically show high copper in UOAs, as this one does.
I wonder whether Subaru uses a copper gasket paste in engine assembly?
Does this engine have an oil cooler, although you see high copper even in those Subarus that don't.


17 Forester 12K MSS 0W-20
12 Accord LX 92K PP 5W-20
09 Forester 95K M1HM 10W-30
01 Focus ZX3 118K PP 5W-20
96 Accord LX 104K T5 10W-30
95 318i
Re: New 18 STI Factory fill UOA 1,300 mi [Re: Spdfrk1990] #4518007
09/16/17 05:14 PM
09/16/17 05:14 PM
Joined: May 2012
Posts: 953
Rio Rancho, NM
Pajero Offline
Pajero  Offline
Joined: May 2012
Posts: 953
Rio Rancho, NM
Nice Moly and Boron! Good stuff.....


Always remember "Planned obsolescence."

1994 Montero SR 3.5 DOHC, 133,xxx
Fram Ultra/ Snorkel with Pre-filter
K-9-Co-pilot
Re: New 18 STI Factory fill UOA 1,300 mi [Re: Spdfrk1990] #4518068
09/16/17 06:49 PM
09/16/17 06:49 PM
Joined: Sep 2009
Posts: 16,002
OH
fdcg27 Offline
fdcg27  Offline
Joined: Sep 2009
Posts: 16,002
OH
Forgot to mention that the STI is a very impressive machine.
Good luck with yours and I hope you enjoy many happy, fast miles in it.


17 Forester 12K MSS 0W-20
12 Accord LX 92K PP 5W-20
09 Forester 95K M1HM 10W-30
01 Focus ZX3 118K PP 5W-20
96 Accord LX 104K T5 10W-30
95 318i
Re: New 18 STI Factory fill UOA 1,300 mi [Re: Spdfrk1990] #4518097
09/16/17 07:30 PM
09/16/17 07:30 PM
Joined: Aug 2003
Posts: 12,892
NE,Ohio
Rand Offline
Rand  Offline
Joined: Aug 2003
Posts: 12,892
NE,Ohio
I would recommend stepping up to a 5w40. Those engines are known to be better on thicker oil.


2019 Jeep Cherokee Trailhawk 2.0T
Re: New 18 STI Factory fill UOA 1,300 mi [Re: Spdfrk1990] #4518159
09/16/17 08:48 PM
09/16/17 08:48 PM
Joined: Jan 2016
Posts: 800
NC
Vladiator Offline
Vladiator  Offline
Joined: Jan 2016
Posts: 800
NC
Do your vehicle a huge favor - use the best oil from the start. Like this here. 0w30 or 0w40 is what I would recommend, but 5w30 is fine as well. 0w30 and 0w40 just have a wider range of operating temperatures.





2000 Lexus GS300-361k
1999 Lexus GS400-213k
2006 Toyota Camry-187k
2006 Toyota Highlander Hybrid-125k
2009 Scion xB-120k
2013 VW Tiguan-120k
2009 Toyota Tacoma-60k
Re: New 18 STI Factory fill UOA 1,300 mi [Re: fdcg27] #4518206
09/16/17 09:34 PM
09/16/17 09:34 PM
Joined: Dec 2006
Posts: 134
Cincinnati
Spdfrk1990 Offline OP
Spdfrk1990  Offline OP
Joined: Dec 2006
Posts: 134
Cincinnati
Originally Posted By: fdcg27
Forgot to mention that the STI is a very impressive machine.
Good luck with yours and I hope you enjoy many happy, fast miles in it.



Thanks, Hoping to keep this one for a long time.


18 Chevrolet Colorado Z71 4x4 V6 | Mobil 1 5w30 EP
18 KIA Stinger GT AWD Limited Edition Sunset Yellow
Re: New 18 STI Factory fill UOA 1,300 mi [Re: Vladiator] #4518210
09/16/17 09:37 PM
09/16/17 09:37 PM
Joined: Dec 2006
Posts: 134
Cincinnati
Spdfrk1990 Offline OP
Spdfrk1990  Offline OP
Joined: Dec 2006
Posts: 134
Cincinnati
Originally Posted By: Vlad_the_Russian
Do your vehicle a huge favor - use the best oil from the start. Like this here. 0w30 or 0w40 is what I would recommend, but 5w30 is fine as well. 0w30 and 0w40 just have a wider range of operating temperatures.



I have not read anything bad about Castrol Edge and been using it for awhile now in my other vehicles. Using the 5w30 to stick to what the manual calls for so I dont have any issues with warranty if I ever have engine trouble.


18 Chevrolet Colorado Z71 4x4 V6 | Mobil 1 5w30 EP
18 KIA Stinger GT AWD Limited Edition Sunset Yellow
Re: New 18 STI Factory fill UOA 1,300 mi [Re: Spdfrk1990] #4518242
09/16/17 10:31 PM
09/16/17 10:31 PM
Joined: Jan 2009
Posts: 6,170
New England
gathermewool Offline
gathermewool  Offline
Joined: Jan 2009
Posts: 6,170
New England
The STI does have an oil cooler. Leaching from it was the suspected cause of high Cu in my '08 STI factory fill, when I posted it way back when.

Viscosity was a little lower than I'd like for your EJ257, but that's OK. I'd also stay away from anything with "Resource Conserving" on the bottle. Your engine will thrive on a slightly heavier, beefier oil. I had good luck with Rotella T6 5W-40. Others have liked various flavors of 0W-40, such as Mobil 1's offering.

Good luck and have fun!


'14 Forester XT (Cobb Stage 1)
Edge 0W-40 + FU filter
'15 Legacy 2.5i (OEM Stage -7)
Edge 0W-20 + FU filter
Re: New 18 STI Factory fill UOA 1,300 mi [Re: fdcg27] #4518264
09/16/17 11:20 PM
09/16/17 11:20 PM
Joined: May 2012
Posts: 1,333
Winchester, Indiana
SubieRubyRoo Offline
SubieRubyRoo  Offline
Joined: May 2012
Posts: 1,333
Winchester, Indiana
Originally Posted By: fdcg27

Subarus typically show high copper in UOAs, as this one does.
although you see high copper even in those Subarus that don't.


fdcg, it's not always right to paint with such a wide brush... not all Subarus shed copper. My 01 Forester UOAs are below, and although I was going too long on OCIs for iron wear (I think due to a filter bypass issue), my copper is low, and the univ. avg is only 4ppm for the non-turbo EJ25s. Other than that, I'm all good.




OP, congrats on your purchase! Hopefully you keep and enjoy it longer than the roughly ~18 month average new ownership that WRX/STIs have. I don't get it either... some people just don't enjoy driving like Ken Block smile

Re: New 18 STI Factory fill UOA 1,300 mi [Re: Spdfrk1990] #4518308
09/17/17 04:45 AM
09/17/17 04:45 AM
Joined: Jan 2016
Posts: 800
NC
Vladiator Offline
Vladiator  Offline
Joined: Jan 2016
Posts: 800
NC
Originally Posted By: Spdfrk1990
Originally Posted By: Vlad_the_Russian
Do your vehicle a huge favor - use the best oil from the start. Like this here. 0w30 or 0w40 is what I would recommend, but 5w30 is fine as well. 0w30 and 0w40 just have a wider range of operating temperatures.



I have not read anything bad about Castrol Edge and been using it for awhile now in my other vehicles. Using the 5w30 to stick to what the manual calls for so I dont have any issues with warranty if I ever have engine trouble.
When it comes to warranty - they will only need proof that the oil changes were done in timely manner (receipts) and they might test the viscosity. When it comes to viscosity test - they will only be able to test for the operating viscosity. So 0w30, 5w30, 10w30, 15w30, 20w30, 25w30, SAE30 will all look the same on their warranty testing. Based on this I would definitely find the MOST ROBUST oil in 30 grade available for the STI. RedLine 0w30 or 5w30 or even 10w30 will most definitely eliminate any oil-related issues for many years/miles to come. And after warranty is over - you could easily stretch it out to 10k OCI, like many here do with amazing UOA results on RedLine oils. Unless you do a lot of track days.

Castrol oils have their additive levels slashed by the API certifications. High performance engines NEED those additives. Redline oils have one of the highest amounts of additives to battle anything that happens inside an engine.

Think of it as boxer vs MMA fighter. Boxer with boxer gloves and boxing rules will not last long in a MMA cage vs an MMA fighter who follows MMA rules during a fight, since boxers are limited to only arms and upper body, while MMA fighters can and will use their whole body to the fullest potential in a fight.


2000 Lexus GS300-361k
1999 Lexus GS400-213k
2006 Toyota Camry-187k
2006 Toyota Highlander Hybrid-125k
2009 Scion xB-120k
2013 VW Tiguan-120k
2009 Toyota Tacoma-60k
Re: New 18 STI Factory fill UOA 1,300 mi [Re: Spdfrk1990] #4518448
09/17/17 09:39 AM
09/17/17 09:39 AM
Joined: Dec 2006
Posts: 134
Cincinnati
Spdfrk1990 Offline OP
Spdfrk1990  Offline OP
Joined: Dec 2006
Posts: 134
Cincinnati
Thanks. I will look into the redline for the next change. I always liked their gear oil but never heard much about the engine oil. Use to hear bad things about the redline engine oil in the past. I guess they have made changes.

Last edited by Spdfrk1990; 09/17/17 09:48 AM.

18 Chevrolet Colorado Z71 4x4 V6 | Mobil 1 5w30 EP
18 KIA Stinger GT AWD Limited Edition Sunset Yellow
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