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#2973091 - 04/15/13 08:02 AM 2005 Subaru Legacy GT, Pennzoil Ultra 10w-30 4040m
05LGTLtd Offline


Registered: 03/04/13
Posts: 1019
Loc: Va
I have my first ever UOA results. I have stayed near the Subaru recommended 3750mi OCI for severe duty. I'm stage 3 with upgraded turbo, injectors, etc. Probably about 300whp. I have run PU for the last four changes at least, and before that it was PP. I run the 10w30 for a bit more shear protection, which seems to be working. I know I could go longerl, but I want my oil to be in grade, so I'd rather dump early and have piece of mind. Too much invested time and money to try to push oci. Looks like my aftermarket intake could use a cleaning and re-oil.

Code:
DATE SAMPLED DATE RECEIVED DATE REPORTED
01-Apr-13 10-Apr-13 11-Apr-13
OIL ANALYSIS REPORT
UIN 032BExx
2005 Legacy GT       91,669mi
Pennzultra 10w30, 4040miles with wix filter

Metals (ppm)
Iron (Fe)		8
Chromium (Cr) 		<1
Lead (Pb) 		 5	
Copper (Cu) 		 2
Tin (Sn) 		<1
Aluminium (Al) 		 3
Nickel (Ni) 		<1
Silver (Ag) 		<1
Titanium (Ti) 		<1
Vanadium (V)		<1
Contaminants (ppm)
Silicon (Si) 		10
Sodium (Na) 		 9
Potassium (K) 		<5
Water (%) 		<0.5
Coolant			No
Additives (ppm)
Magnesium (Mg) 		3
Calcium (Ca) 		2565
Barium (Ba) 		<1
Phosphorus (P) 		738
Zinc (Zn) 		853
Molybdenum (Mo)	 	57
Boron (B)		232
Physical Tests
Viscosity (cSt 100C)	10.0
Physical / Chemical
Base Number (mgKOH/g)	4.5




Edited by 05LGTLtd (04/15/13 08:04 AM)

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#2973098 - 04/15/13 08:10 AM Re: 2005 Subaru Legacy GT, Pennzoil Ultra 10w-30 4040m [Re: 05LGTLtd]
05LGTLtd Offline


Registered: 03/04/13
Posts: 1019
Loc: Va
I ran this interval for 4-5 months. I hope to pull another UOA with similar miles on the the Castrol Edge 0w-40 I put in this time as well. After that I might even do a round of 0w40 M1 for giggles.

I will run my car up into high rpm's on occasion. Most of my driving is a 15min commute into work and around town. the commute is mostly highway. Seems like the 10w30 PU is a good choice for Turbo Subaru's. Being a moderate climate around here I had been running it year round. No noticeable cold start problems due to not staying with a 5w30 as primary recommendation by subaru.

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#2973116 - 04/15/13 08:43 AM Re: 2005 Subaru Legacy GT, Pennzoil Ultra 10w-30 4040m [Re: 05LGTLtd]
147_Grain Offline


Registered: 03/11/13
Posts: 1945
Loc: USA
Excellent Report.

I too like the PU 10W-30 that has plenty of boron and moly in it. Your modified engine needs the extra protection and margin of error from more frequent servicing... since you have "too much invested time and money to try to push oci".

Good luck.

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#2973119 - 04/15/13 08:45 AM Re: 2005 Subaru Legacy GT, Pennzoil Ultra 10w-30 4040m [Re: 05LGTLtd]
cat843 Offline


Registered: 04/09/13
Posts: 589
Loc: East Coast, USA
Looks good. TBN is far above the value where you should change the oil based upon TBN. Oxidation & nitration?
_________________________
Cat-Man-843

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#2973158 - 04/15/13 09:51 AM Re: 2005 Subaru Legacy GT, Pennzoil Ultra 10w-30 4040m [Re: 05LGTLtd]
FZ1 Offline


Registered: 02/07/08
Posts: 4546
Loc: Texas
Looks good.

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#2973159 - 04/15/13 09:51 AM Re: 2005 Subaru Legacy GT, Pennzoil Ultra 10w-30 4040m [Re: 05LGTLtd]
05LGTLtd Offline


Registered: 03/04/13
Posts: 1019
Loc: Va
I forgot to mention that I did add 2/3 a quart toward the end of the OCI, that likely bumped the TBN some. I'm undecided if I'm in the "1/3" or "<1" camp yet on TBN. I'd rather know I have working oil and change while it's good, instead of exhausting every last drop of useable life out of an oci.

Since this was my first uoa, didn't really know what would come back for sure. Although I had a feeling that TBN wise I was leaving some on the table following the severe service 3750 oci with synthetic.

I've always been more worried about shearing viscosity down and having issues from that. I once added up my total modification costs, and I then decided oil was cheap. :-)

Thanks for all the comments!

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#2973238 - 04/15/13 11:01 AM Re: 2005 Subaru Legacy GT, Pennzoil Ultra 10w-30 4040m [Re: 05LGTLtd]
05LGTLtd Offline


Registered: 03/04/13
Posts: 1019
Loc: Va
This was the Napa analysis lab in Altlanta, fyi.

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#2973608 - 04/15/13 04:40 PM Re: 2005 Subaru Legacy GT, Pennzoil Ultra 10w-30 4040m [Re: 05LGTLtd]
bluesubie Offline


Registered: 08/04/03
Posts: 2182
Loc: NJ
I would probably want lead a little lower on such a short interval. IMO, your silicon probably won't drop that much with that intake. In addition to helping the TBN, I'm guessing the make-up oil may have increased the viscosity as well.

What EM and are you protuned? Looking forward to the BC uoa if you do one.

drive
-Dennis


Edited by bluesubie (04/15/13 04:44 PM)
_________________________
'04 Subaru Forester 2.5XT
Mobil 1 0W-40

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#2973968 - 04/15/13 09:49 PM Re: 2005 Subaru Legacy GT, Pennzoil Ultra 10w-30 4040m [Re: 05LGTLtd]
05LGTLtd Offline


Registered: 03/04/13
Posts: 1019
Loc: Va
Open Source and tactrix cable, tuned via email by Infamous1. 16gBNR, Cobb intake, avo tmic, grimspeed up/xpipe, Cobb dp, catback, 650cc injectors, cp, tgv deletes...

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#2974922 - 04/16/13 07:17 PM Re: 2005 Subaru Legacy GT, Pennzoil Ultra 10w-30 4040m [Re: 05LGTLtd]
artificialist Offline


Registered: 09/23/07
Posts: 8440
Loc: Florida
I run 10w30 synthetic for the exact reason, and this UOA makes me feel happier about my decision.

However, I am using Castrol Gold Edge.
_________________________
2010 Lancer Ralliart Sportback

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#2974934 - 04/16/13 07:26 PM Re: 2005 Subaru Legacy GT, Pennzoil Ultra 10w-30 4040m [Re: 05LGTLtd]
Clevy Offline


Registered: 11/11/10
Posts: 9783
Loc: Saskatoon canada
Originally Posted By: 05LGTLtd
I have my first ever UOA results. I have stayed near the Subaru recommended 3750mi OCI for severe duty. I'm stage 3 with upgraded turbo, injectors, etc. Probably about 300whp. I have run PU for the last four changes at least, and before that it was PP. I run the 10w30 for a bit more shear protection, which seems to be working. I know I could go longerl, but I want my oil to be in grade, so I'd rather dump early and have piece of mind. Too much invested time and money to try to push oci. Looks like my aftermarket intake could use a cleaning and re-oil.

Code:
DATE SAMPLED DATE RECEIVED DATE REPORTED
01-Apr-13 10-Apr-13 11-Apr-13
OIL ANALYSIS REPORT
UIN 032BExx
2005 Legacy GT       91,669mi
Pennzultra 10w30, 4040miles with wix filter

Metals (ppm)
Iron (Fe)		8
Chromium (Cr) 		<1
Lead (Pb) 		 5	
Copper (Cu) 		 2
Tin (Sn) 		<1
Aluminium (Al) 		 3
Nickel (Ni) 		<1
Silver (Ag) 		<1
Titanium (Ti) 		<1
Vanadium (V)		<1
Contaminants (ppm)
Silicon (Si) 		10
Sodium (Na) 		 9
Potassium (K) 		<5
Water (%) 		<0.5
Coolant			No
Additives (ppm)
Magnesium (Mg) 		3
Calcium (Ca) 		2565
Barium (Ba) 		<1
Phosphorus (P) 		738
Zinc (Zn) 		853
Molybdenum (Mo)	 	57
Boron (B)		232
Physical Tests
Viscosity (cSt 100C)	10.0
Physical / Chemical
Base Number (mgKOH/g)	4.5




If dropping out of grade doesn't contribute to more wear what exactly does it harm,which then begs the question why not extend the interval more since you are getting uoa done anyways it would be smart money spent to see how far you can go,thereby getting value from the oil.
If your going to spend the money acquiring data why not use that data to extend lube run times and get a return on investment confused
_________________________
2006 Charger RT
Miles x 2 per oil filter

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#2975012 - 04/16/13 09:12 PM Re: 2005 Subaru Legacy GT, Pennzoil Ultra 10w-30 4040m [Re: Clevy]
KHP Offline


Registered: 08/01/11
Posts: 168
Loc: Reno, NV
Originally Posted By: Clevy
If dropping out of grade doesn't contribute to more wear what exactly does it harm,which then begs the question why not extend the interval more since you are getting uoa done anyways it would be smart money spent to see how far you can go,thereby getting value from the oil.
If your going to spend the money acquiring data why not use that data to extend lube run times and get a return on investment confused


+1

That oil came from the refinery with viscosity of 10 cst @100C. The oil didn't shear a single point at your current OCI.

I have a similar engine on my 2011 WRX and I run the 5w30 flavor of PU. Due to higher viscosity index it technically should be more prone to shearing than 10w30 that you ran. Mine didn't shear a single point at 7,500 OCI either.

PU is such a stout oil that I wouldn't doubt it would last longer in your engine with as much protection as the day you poured it in.

Even at 7,500 miles I think I can go even longer with PU and I would if it wasn't for my factory warranty.

Check out my UOA here.


Edited by KHP (04/16/13 09:25 PM)
_________________________
2011 Impreza WRX Limited (46k Mi): OCI = 7.5K Mi - Pennzoil Ultra 5w/10w30 - OEM blue oil filter/P1 PL14612

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#2975577 - 04/17/13 11:48 AM Re: 2005 Subaru Legacy GT, Pennzoil Ultra 10w-30 4040m [Re: Clevy]
05LGTLtd Offline


Registered: 03/04/13
Posts: 1019
Loc: Va

Quote:


If dropping out of grade doesn't contribute to more wear what exactly does it harm,which then begs the question why not extend the interval more since you are getting uoa done anyways it would be smart money spent to see how far you can go,thereby getting value from the oil.
If your going to spend the money acquiring data why not use that data to extend lube run times and get a return on investment confused


My car is spec'd for a 30 or 40 weight oil. It is not spec'd for a Xw-20, so I'd rather not risk any shear.

Although lots of folks use uoa's to determine how much they can push the oci, that was not my goal here. I just wanted to know if my engine looked good (first uoa @91k) and if the oil was doing what I thought it was. If TBN was bumped up some by the make up oil I added, and you subscribe to the 1/3 of original TBN, then there may not have been much more life left in this sample. Opinions on that will vary, I get it. Without a TAN it's harder to tell.

Also since I had run this oil exclusively for the last few oci's I thought it was a good time to test. With PU drying up in some areas I was not sure how much longer I would continue with it. I have now switched to Castrol 0w40 and will get an uoa at about the same usage so I can compare.

I personally think PU is a great oil, but if I can get GC/BC for less I will switch. Just trying to verify that I'm not compromising anything doing so. I have always run the short "severe duty" interval, and have not problems with my avcs or the banjo filter, fwiw. (I don't have the banjo filter anymore, since upgraded turbo supply line when installing the 16g ~30k ago.)


Edited by 05LGTLtd (04/17/13 11:48 AM)

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#2975579 - 04/17/13 11:50 AM Re: 2005 Subaru Legacy GT, Pennzoil Ultra 10w-30 4040m [Re: 05LGTLtd]
05LGTLtd Offline


Registered: 03/04/13
Posts: 1019
Loc: Va

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#2975670 - 04/17/13 01:39 PM Re: 2005 Subaru Legacy GT, Pennzoil Ultra 10w-30 4040m [Re: 05LGTLtd]
KHP Offline


Registered: 08/01/11
Posts: 168
Loc: Reno, NV
Originally Posted By: 05LGTLtd


I looked into getting one of those for my WRX as well, but when I saw that my engine didn't consume much oil. I didn't see a need to run one(at least in my application).

I forgot to mention on my post above. Nice looking report. thumbsup
_________________________
2011 Impreza WRX Limited (46k Mi): OCI = 7.5K Mi - Pennzoil Ultra 5w/10w30 - OEM blue oil filter/P1 PL14612

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