'14 Subaru WRX | PU 5W30 | 15,336mi change

[Julch]

Hey guys,
So I did my 2nd oil change (not counting the post 1000mi break-in oil change) on my new '14 Subaru WRX - couldn't get to it till about 300 miles later than I was aiming for.

UOA completed by Blackstone Labs below:

Code:
MI on Oil 7,985

MI on Unit 15,336

Sample Date 01/31/15

Make Up Oil Added 0 qt

Oil Type PENNZOIL ULTRA 5W/30



Universal Avgs

ALUMINUM 7 4

CHROMIUM 1 1

IRON 20 9

COPPER 5 9

LEAD 0 3

TIN 5 1

MOLYBDENUM 69 73

NICKEL 1 0

MANGANESE 1 2

SILVER 1 0

TITANIUM 2 1

POTASSIUM 4 2

BORON 47 46

SILICON 9 10

SODIUM 8 30

CALCIUM 2354 1902

MAGNESIUM 18 425

PHOSPHORUS 723 832

ZINC 847 984

BARIUM 0 0



SUS Viscosity @ 210°F 56.3

cSt Viscosity @ 100°C 9.15

Flashpoint in °F 360

Fuel % TR

Antifreeze % 0.0

Water % 0.0

Insolubles 0.2

TBN

TAN

ISO CODE


COMMENTS:
You went a little longer on this oil than you were hoping to, and that's fine. The only metal that really came up was iron, which is normal after a longer interval. Iron is from steel parts and it's the only metal that should increase much after a longer oil run, while the other metals stay steady and closer to averages like they did here. Keep in mind that some of this material is also residual wear-in, so we won't be surprised to find iron a little better on a ppm/mile basis next time. The trace of fuel is harmless, so don't let it ruin this great report. Try 10K miles next!

My UOA at 7,500mi can be found posted at this thread, and I've also put it below here:
Code:
MI on Oil 4,500

MI on Unit 7,500

Sample Date 07/23/14

Make Up Oil Added 0 qt

Oil Type PENNZOIL ULTRA 5W/30



Universal Avgs

ALUMINUM 7 4

CHROMIUM 1 1

IRON 15 9

COPPER 7 9

LEAD 0 3

TIN 3 1

MOLYBDENUM 170 73

NICKEL 1 0

MANGANESE 1 2

SILVER 1 0

TITANIUM 2 1

POTASSIUM 0 2

BORON 87 45

SILICON 16 10

SODIUM 6 30

CALCIUM 2342 1908

MAGNESIUM 19 423

PHOSPHORUS 774 831

ZINC 865 982

BARIUM 0 0



SUS Viscosity @ 210°F 55.3

cSt Viscosity @ 100°C 8.85

Flashpoint in °F 375

Fuel %
Antifreeze % 0.0

Water % 0.0

Insolubles 0.3

TBN

TAN

ISO CODE


The only thing reading out of line in this sample was silicon, but that's a pretty common find in new engines. It's just residual from seals used when the engine was assembled, and it usually takes two or three oil changes for all of the residual silicon to wash out completely. That might also be why our metals are just a little high compared to averages, from wear-in of new parts. Universal averages are based on ~3,900 miles of oil use, so your metals really aren't bad on a longer oil run, but you may see some improvements next time. All in all, a very nice report here!

At this oil change I put in 2 qt PU 5W30 and 3 qt of Pennzoil Ultra Euro 5W40 as per some recommendations in my previous thread.

What are your guys thoughts on this? Looking good? Right move for the slightly heavier oil mix for this past change?

-Jeff

 

[pbm]

I'm no expert but it looks very good for 15K on a turbo.
The 15K OCI is not much different than the 7.5K (in other words you went twice the distance with very little additional wear).

 

[bigt61]

His 1st change was a 4500 mile OCI - the 2nd was a 7985 mile OCI. The #'s don't look bad - but the oil is getting seriously thin for a 30. Either shearing or dilution is going on with a low flashpoint as well. 8000 miles is probably enough in this application, I wouldn't push it. The dilution should improve with break in.

 

[Pesca]

The title is misleading: Should be 8000 mi change.

looks good. What is your driving habits?
Is it a 6 month OCI?

 

[bluesubie]

Looks great and pretty impressive that there was no make-up oil. Yep, probably some shearing and/or fuel dilution going on since viscosity and flashpoint are low.

 

[sicko]

Originally Posted By: Pesca
The title is misleading: Should be 8000 mi change.


Agreed.


Julch, in the future you should put the mileage of the oil in the thread title and not the mileage of the vehicle at the time of the oil change.

Overall the UOA looks good. Since it's only the second oil change, I bet the wear numbers will continue to go down with the next oil change. The oil did shear down to a thin 30 weight, but it appears to still be doing a good job.

What's your driving style like, and how is the vehicle used?

 

[Julch]

Ah alright yeah guess I did the title mileage wrong, my bad. Live and learn.

Sounds good though, looking forward to seeing how the current 2qt PU 5W30 / 3qt PU Euro 5W40 works this time, hopefully reducing the amount the 30 dilutes /shears to.

I use this as a daily driver and on some long trips. Moderate aggressiveness usually, the occasional aggressive pulls here and there. Typically highway driving with a little bit of city, not usually any traffic. Some days have a number of starts.

The 30/40 mix seems to be driving smoothly so far.