PU 5W30 SN - 2011 WRX - 7,480 Miles

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KHP

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Just wanted to share my latest UOA. Oil used is PU 5W30 SN with Subaru OEM filter(Honeywell Blue Can).

IMO the oil is working pretty well with the engine. I'm planning on staying with current oil, and filter for future 7,500 mile OCI's. I will also stop the half interval samples as I feel that I've gotten sufficient trend info from previous samples. I will not be extending my oil changes past 7,500 miles to preserve my car warranty.

This car is my DD. My driving consists of 75/25 highway/city driving. 15-20 Minutes to work 1 way. Tons of mountain driving. Desert temperatures of 100+ summer and
Quote:
Blackstone's Comments:
This is a great report. This is one of the longest oil runs across the page yet metals are just about
as low as we've ever seen from your particular Subaru engine. Iron has been lower than this in the past, but
that was after shorter oil runs. We expect iron to accumulate in the oil as the oil sees more use, so really,
this reading of 12 ppm is excellent considering the nice, long oil run. The TBN shows some active additive
left at 2.4 since 1.0 is low. The TAN measured 5.0, which probably isn't too acidic at all. No coolant, water,
or fuel was found. Try 9,000 miles next.


Samples Dated: 05/04/12 and 10/23/11 are half interval samples to create trend. Oil and filter were not changed at time of sampling.
Code:


Miles on Oil ---------- 7,480 -------- 3,780 -------- 7,538 -------- 3,813 -------- 3,744 ----- 2,718 Universal

Miles on Unit 22,520 18,820 15,040 11,315 7,502 3,758 Averages

Sample Date 08/12/12 05/04/12 02/04/12 10/23/11 07/23/11 03/12/11

Make Up Oil added ------ 0Qts --------- 0Qts ------ 0.75Qts --------- 0Qts --------- 0Qts ------ 0Qts



Aluminum ------------------ 4 ------------ 4 ------------ 5 ------------ 4 ------------ 4 --------- 5 ----------- 4

Chromium 1 1 1 1 1 0 1

Iron 12 8 16 10 17 13 9

Copper -------------------- 6 ------------ 4 ------------ 8 ------------ 8 ------------ 8 --------- 7 ----------- 8

Lead 0 0 0 0 0 0 4

Tin 0 0 0 0 0 5 1

Molybdenum --------------- 52 ----------- 51 ----------- 64 ----------- 78 ---------- 109 ------- 247 ---------- 74

Nickel 1 0 1 1 0 0 0

Manganese 3 3 0 0 0 1 1

Silver -------------------- 0 ------------ 1 ------------ 0 ------------ 0 ------------ 0 --------- 0 ----------- 0

Titanium 2 2 2 3 3 0 0

Potassium 3 3 5 1 2 0 2

Boron -------------------- 51 ----------- 79 ----------- 34 ----------- 51 ----------- 62 -------- 21 ---------- 48

Silicon 6 4 8 8 10 18 11

Sodium 6 7 31 37 38 2 27

Calcium ---------------- 2175 --------- 2177 --------- 1155 --------- 1163 --------- 2678 ------ 2186 -------- 2083

Magnesium 101 104 639 608 19 11 305

Phosphorus 624 672 660 667 789 706 783

Zinc -------------------- 752 ---------- 754 ---------- 786 ---------- 774 ---------- 936 ------- 741 --------- 932

Barium 0 0 0 0 0 0 0





SUS Viscosity @ 210F --- 57.9 --------- 57.8 --------- 55.2 --------- 56.6 --------- 56.4 ------ 53.9

cSt Viscosity @ 100C 9.62 9.58 8.83 9.23 9.19 8.46

Flashpoint in F 400 385 405 395 385 400

Fuel % -----------------
Antifreeze % 0.0 0.0 0.0 0.0 ? 0.0

Water % 0.0 0.0 0.0 0.0 0.0 0.0

Insolubles % ------------ 0.3 ---------- 0.3 ---------- 0.3 ---------- 0.4 ---------- 0.2 ------- 0.2

TBN 2.4 3.6

TAN 5.0 5.0

ISO Code ---------- PU 5W30SN ---- PU 5W30SN -- M1EP 5W30SN -- M1EP 5W30SN -- M1EP 5W30SM -- MbilCln 5000 5w30SM
 
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Looks good for a turbo Subie.
I'd say that PU is a good pick for this engine as you use it.
Your last run of M1 EP doesn't look any better, and it did require some oil adds, but the engine is more fully broken in for this run than it was then.
Does this engine use bearings without lead?
 
Thin 5w-30 (almost 5w-20) in a turbocharged engine with such a high power density sporting a fairly small sump and without an external oil cooler is a no go to me in a hot climate.

It's working well for now, but a good 5w-40 or 0w-40 would be cheap insurance. If you can find PU 5w-40 that'd be dandy.
 
Originally Posted By: JRed
Thin 5w-30 (almost 5w-20) in a turbocharged engine with such a high power density sporting a fairly small sump and without an external oil cooler is a no go to me in a hot climate.

It's working well for now, but a good 5w-40 or 0w-40 would be cheap insurance. If you can find PU 5w-40 that'd be dandy.


PU is thicker than M-1EP. There is nothing that screams about this UOA that 5W30 PU is less than sufficient.

OP thanks for the data this engine is looking good and either lubricant you chose will be fine for the factory recommended OCI once out of warranty you will be able to extend your OCI if you chose to. Are you planing future UOA's?
 
Originally Posted By: tig1
Why such short OCIs?

It seems to be a Subaru thing. Their recommended OCI is 3,750 miles.
 
Thanks for the responses guys. I'm keeping to the 7,500 mile standard OCI since its what's mentioned in the service schedule to honor the warranty(I'm covered for 7 years 75,000 miles). 3,750 mile OCI is for severe operations I wouldn't consider my driving as severe.

2011 models is the first year Subaru started pushing for the "extended" drain schedule of 7,500 miles and as from my results it seems very reasonable with today's quality oils.

I will continue to do lab analysis just not at the frequency that I'm doing right now. I'll be doing it every oil change and will stop the half cycle sampling.

I'm planning on switching to a heavier viscosity oil after my warranty is up and start playing with engine mods.

Do you guys know whether the newer Subaru engines Turbo EJ255, EJ257 have leaded bearings? It just seems odd and I guess exceptionally good that it hasn't shown a trace in my UOA's.
 
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My UOAs generally show 2-3 ppm of lead, so I believe Subaru did use Lead bearings at least in 2007. It's always possible they've switched.

Thanks for being the guinea pig for GF-5 oil in a turbo Subie. Ultra seems to hold up pretty well.
 
You posted in the wrong forum. This should go in the Virgin Oil Analysis Forum.
grin2.gif
The lack of consumption makes me think those very low NOACK figures from the PDS might actually be correct. Thanks for posting.
thumbsup2.gif


-Dennis
 
Originally Posted By: gpshumway
My UOAs generally show 2-3 ppm of lead, so I believe Subaru did use Lead bearings at least in 2007. It's always possible they've switched.

Thanks for being the guinea pig for GF-5 oil in a turbo Subie. Ultra seems to hold up pretty well.


Hmm.. I'm thinking that they might have switched bearing material...

I do enjoy doing controlled testing/experiment so I volunteered to take one for the team on this one (I can't help it. I'm an engineer lol...). I don't see any problems running this weight of oil on my Subie. If my engine fails now I'm not too sure that the little difference in viscosity (30 vs. 40 weight) at operating temperature would do too much to save the situation.

Originally Posted By: bluesubie
You posted in the wrong forum. This should go in the Virgin Oil Analysis Forum.
grin2.gif
The lack of consumption makes me think those very low NOACK figures from the PDS might actually be correct. Thanks for posting.
thumbsup2.gif


-Dennis


Thanks! I gotta say that the very low NOACK figures may be correct as well. I didn't see any hint of oil consumption during this run. The oil seems to be very stable.
 
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Originally Posted By: Izb
We are waiting fo next UOAs.


I'm just about half way done with this interval and my engine is still purring like its new. It's been pretty quiet here regarding turbo Subaru's. Don't worry I'll share my next UOA here.
 
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