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#2558443 - 03/05/12 10:39 PM M1 EP 5W30 7538 Miles - 2011 WRX
KHP Offline


Registered: 08/01/11
Posts: 168
Loc: Reno, NV
So here's the result of my last oil change. I have used the OEM blue Subaru oil filter and Mobil 1 EP 5W30 SN. This oil have seen some pretty extreme service ranging from >110F desert and <20F winter temps. This oil change has accumulated quite a bit of mileage in mountain driving. I would blame the oil consumption to engine braking required for mountain driving. The car wasn't babied during this interval. There were quite a few sprints to red line. My car is completely stock from the factory.

As mentioned in the comments, sample dated 10/23/11 is a sample taken at the halfway point so that we can get a rough trend on how the oil performed. What do you guys think of the results?

Quote:

Comments:
This oil wasn't changed out at the last sample, and it held up quite nicely with 7,500+ miles on it. Your
WRX's engine put much less wear in the oil (per mile) during the second half of the oil change interval. The TBN came
back at 3.6, showing plenty of active additive remaining to go even longer. The TAN was 5.0, showing that the oil had
become a little acidic though, so it may be a good idea to stick with about 7,500 miles in the future. The slightly low
viscosity isn't cause for concern. This engine is in good shape and this oil is working well for you.


Code:
Miles on Oil ---------- 7,538 -------- 3,813 -------- 3,744 ----- 2,718     Universal
Miles on Unit          15,040         11,315          7,502       3,758     Averages
Sample Date          02/04/12       10/23/11       07/23/11    03/12/11
Make Up Oil added ---- 0.75Qt ---------- 0Qt ---------- 0Qt ------- 0Qt

Aluminum ------------------ 5 ------------ 4 ------------ 4 --------- 5 ----------- 4
Chromium                    1              1              1           0             1
Iron                       16             10             17          13             9
Copper -------------------- 8 ------------ 8 ------------ 8 --------- 7 ----------- 8
Lead                        0              0              0           0             4
Tin                         0              0              0           5             1
Molybdenum --------------- 64 ----------- 78 ---------- 109 ------- 247 ---------- 74
Nickel                      1              1              0           0             0
Manganese                   0              0              0           1             1
Silver -------------------- 0 ------------ 0 ------------ 0 --------- 0 ----------- 0
Titanium                    2              3              3           0             0
Potassium                   5              1              2           0             2
Boron -------------------- 34 ----------- 51 ----------- 62 -------- 21 ---------- 48
Silicon                     8              8             10          18            11
Sodium                     31             37             38           2            27
Calcium ---------------- 1155 --------- 1163 --------- 2678 ------ 2186 -------- 2083
Magnesium                 639            608             19          11           305
Phosphorus                660            667            789         706           783
Zinc -------------------- 786 ---------- 774 ---------- 936 ------- 741 --------- 932
Barium                      0              0              0           0             0


SUS Viscosity @ 210F --- 55.2 --------- 56.6 --------- 56.4 ------ 53.9
cSt Viscosity @ 100C     8.83           9.23           9.19        8.46
Flashpoint in F           405            395            385         400
Fuel % ----------------- <0.5 --------- <0.5 --------- <0.5 ------ <0.5
Antifreeze %              0.0            0.0              ?         0.0
Water %                   0.0            0.0            0.0         0.0
Insolubles % ------------ 0.3 ---------- 0.4 ---------- 0.2 ------- 0.2
TBN                       3.6
TAN                       5.0
ISO Code          M1EP 5W30SN    M1EP 5W30SN    M1EP 5W30SM    MbilCln 5000 5w30SM


Edited by KHP (03/05/12 10:49 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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#2558486 - 03/06/12 12:17 AM Re: M1 EP 5W30 7538 Miles - 2011 WRX [Re: KHP]
Ayrton Offline


Registered: 09/28/10
Posts: 666
Loc: Washington State, U.S.
These are great results for such a high performing vehicle.

Furthermore, while you have greatly controlled break-in wear with all these oil changes, there is no doubt still some little extra break in bits floating around.

Therefore, I would only expect to see it get a tiny bit better in the future. Not that you need it to. Great results.

Looks like an awesome car with a great oil! Fun to compare the SN & SM oil and the Mobil Clean too!


Edited by Ayrton (03/06/12 12:18 AM)

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#2558545 - 03/06/12 04:11 AM Re: M1 EP 5W30 7538 Miles - 2011 WRX [Re: KHP]
Turk Offline


Registered: 02/03/06
Posts: 9103
Loc: MN
Looks good, but definitely sheared.
_________________________
03 GMC Sierra 4x4 200k M1 0-40+PU
00 Saturn SL2 89 YO Lady Car 92k, Edge Ext
98 Saturn SC2 Rare "Red Hot" 165k, Edge Ext
97 Camry 245k, Maxlife


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#2558568 - 03/06/12 05:33 AM Re: M1 EP 5W30 7538 Miles - 2011 WRX [Re: KHP]
dnewton3 Offline



Registered: 05/14/07
Posts: 6367
Loc: Indianapolis, IN
Looks good.

Anyone notice that the dino oil did as well on a per-mile basis as the ultra expensive syn in the shorter OCIs? Granted, there is only one sample on the Clean5000, but that is also the first of the break in oils, and yet the break in wear is tremendously low.

What these are telling you is that:
1) your engine is wearing well
2) you need to continue to extend your OCIs with EP

I'd say try 10k miles, with TBN again, and see how things fare.

The engine, itself, is in excellent shape.


Edited by dnewton3 (03/06/12 05:34 AM)
_________________________
Conventionals vs. Synthetics isn't about which is "better"; it's about which lasts longer, while assuring safe operation, in relation to cost. Any product can be over or under utilized. The same applies to filters.
Make an informed decision; first consider your operating conditions, next determine your maintenance plan, and then pick your lube and filter. Don't do it the other way around ...

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#2558596 - 03/06/12 07:06 AM Re: M1 EP 5W30 7538 Miles - 2011 WRX [Re: KHP]
PZR2874 Offline


Registered: 05/06/11
Posts: 499
Loc: San Antonio, TX
^You didn't see this part?

The TAN was 5.0, showing that the oil had
become a little acidic though, so it may be a good idea to stick with about 7,500 miles in the future.


I say it's a gutsy move to run M1 in a boxer engine


Edited by PZR2874 (03/06/12 07:06 AM)
_________________________
2007 Mazdaspeed 3 - 123K
2007 Forester XT - 96K

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#2558686 - 03/06/12 08:59 AM Re: M1 EP 5W30 7538 Miles - 2011 WRX [Re: KHP]
KHP Offline


Registered: 08/01/11
Posts: 168
Loc: Reno, NV
Thanks for the responses guys. I'm planing on sticking with 7500 mile OCI's until my warranty runs out at least. The oil did shear quite a bit, but what oil doesn't shear now days that is not HDEO?

My current fill now is PU 5W30 SN and again with OEM oil filter. I've seen that PU keeps viscosity a little better than M1. From what I've seen PU also protects just as good if not better than M1. As an additional plus its slightly cheaper than M1 EP.

The trends look pretty promising yet I probably shouldn't count my chickens yet until the next UOA.


Edited by KHP (03/06/12 09:01 AM)
_________________________
2011 Impreza WRX Limited (46k Mi): OCI = 7.5K Mi - Pennzoil Ultra 5w/10w30 - OEM blue oil filter/P1 PL14612

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#2558735 - 03/06/12 09:35 AM Re: M1 EP 5W30 7538 Miles - 2011 WRX [Re: KHP]
Ayrton Offline


Registered: 09/28/10
Posts: 666
Loc: Washington State, U.S.
Originally Posted By: KHP
Thanks for the responses guys. I'm planing on sticking with 7500 mile OCI's until my warranty runs out at least. The oil did shear quite a bit, but what oil doesn't shear now days that is not HDEO?

My current fill now is PU 5W30 SN and again with OEM oil filter. I've seen that PU keeps viscosity a little better than M1. From what I've seen PU also protects just as good if not better than M1. As an additional plus its slightly cheaper than M1 EP.

The trends look pretty promising yet I probably shouldn't count my chickens yet until the next UOA.


I think the 7,500 intervals are smart.

I'm sure you could always try regular Mobil 1 5w30 in the future too, if it was any cheaper than the EP. With these on-time, oil changes, I don't see why the regular Mobil 1 5w30 wouldn't do great too!

With the PU, I'm sure you will likely see even slightly better results on the next check because you will have gotten the majority of break in bits out in this last draining, so it won't be the PU alone (or at all) making it look better.

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#2558815 - 03/06/12 10:42 AM Re: M1 EP 5W30 7538 Miles - 2011 WRX [Re: Ayrton]
KHP Offline


Registered: 08/01/11
Posts: 168
Loc: Reno, NV
Originally Posted By: Ayrton
With the PU, I'm sure you will likely see even slightly better results on the next check because you will have gotten the majority of break in bits out in this last draining, so it won't be the PU alone (or at all) making it look better.


M1 will get a good amount credit to how well the engine is doing right now. I really have no preference in oil so I'll probably end up switching between M1 and PU for my oil changes.
_________________________
2011 Impreza WRX Limited (46k Mi): OCI = 7.5K Mi - Pennzoil Ultra 5w/10w30 - OEM blue oil filter/P1 PL14612

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#2558974 - 03/06/12 01:07 PM Re: M1 EP 5W30 7538 Miles - 2011 WRX [Re: KHP]
Ayrton Offline


Registered: 09/28/10
Posts: 666
Loc: Washington State, U.S.
Originally Posted By: KHP
Originally Posted By: Ayrton
With the PU, I'm sure you will likely see even slightly better results on the next check because you will have gotten the majority of break in bits out in this last draining, so it won't be the PU alone (or at all) making it look better.


M1 will get a good amount credit to how well the engine is doing right now. I really have no preference in oil so I'll probably end up switching between M1 and PU for my oil changes.


Good to hear. Nothing wrong with that, two of the very best right there!

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#2559204 - 03/06/12 04:59 PM Re: M1 EP 5W30 7538 Miles - 2011 WRX [Re: KHP]
bluesubie Offline


Registered: 08/04/03
Posts: 2073
Loc: NJ
A 7,500 mile uoa in a WRX on Resource Conserving oil is rare. When first looking at this, I expected the viscosity would be under 8 cst's so it's not that bad IMO. Although I'm very curious, I wouldn't run a 7,500 OCI on an RC oil, even with no wear, but that's just me. You're covered under the warranty though!

Thanks for posting!

-Dennis
_________________________
'04 Subaru Forester 2.5XT
Motul X-clean 5W-30

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#2559737 - 03/07/12 06:03 AM Re: M1 EP 5W30 7538 Miles - 2011 WRX [Re: KHP]
PZR2874 Offline


Registered: 05/06/11
Posts: 499
Loc: San Antonio, TX
PU doesn't do all that well in Subies in my experience... Produces too much blow-by (at least in my 07wrx and STi)

Rotella T6 has always been the go-to for all my Subies.
_________________________
2007 Mazdaspeed 3 - 123K
2007 Forester XT - 96K

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#2559755 - 03/07/12 06:36 AM Re: M1 EP 5W30 7538 Miles - 2011 WRX [Re: PZR2874]
JAG Offline


Registered: 10/23/05
Posts: 4550
Loc: Fredericksburg, VA
Originally Posted By: PZR2874
PU doesn't do all that well in Subies in my experience... Produces too much blow-by (at least in my 07wrx and STi)

How do you determine how much blow-by there is?

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#2560333 - 03/07/12 05:21 PM Re: M1 EP 5W30 7538 Miles - 2011 WRX [Re: JAG]
bluesubie Offline


Registered: 08/04/03
Posts: 2073
Loc: NJ
Originally Posted By: JAG
Originally Posted By: PZR2874
PU doesn't do all that well in Subies in my experience... Produces too much blow-by (at least in my 07wrx and STi)

How do you determine how much blow-by there is?

By the amount of oil you find in the intake plumbing when you remove the intercooler.
http://flatironsrally.typepad.com/faq/2007/12/what-is-blow-by.html

-Dennis
_________________________
'04 Subaru Forester 2.5XT
Motul X-clean 5W-30

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#2560363 - 03/07/12 05:48 PM Re: M1 EP 5W30 7538 Miles - 2011 WRX [Re: KHP]
JAG Offline


Registered: 10/23/05
Posts: 4550
Loc: Fredericksburg, VA
Thanks Dennis. My VW 1.8T gets a puddle of oil in the intercooler too which sucks. I would think the amount of oil in there in a given engine and given everything else except varying oil type would depend mostly on amount of blowby, which increases crankcase pressure, and the oil's volatility.

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#2560684 - 03/07/12 11:11 PM Re: M1 EP 5W30 7538 Miles - 2011 WRX [Re: KHP]
steve20 Offline


Registered: 06/19/07
Posts: 3202
Loc: Morris County NJ
Originally Posted By: KHP
Thanks for the responses guys. I'm planing on sticking with 7500 mile OCI's until my warranty runs out at least. The oil did shear quite a bit, but what oil doesn't shear now days that is not HDEO?

My current fill now is PU 5W30 SN and again with OEM oil filter. I've seen that PU keeps viscosity a little better than M1. From what I've seen PU also protects just as good if not better than M1. As an additional plus its slightly cheaper than M1 EP.

The trends look pretty promising yet I probably shouldn't count my chickens yet until the next UOA.


Really nice looking report-especially under the conditions you mentioned. I bet you will see even lower Fe levels on a PU UOA if you choose to do one
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