Mobil 1 Truck & SUV 5W-40, 5099 mi, 04 Subaru WRX

[SilverGGA]

My first UOA, hopefully the format looks fine...

code:

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Equipment Make: 2004 Subaru WRX (5MT Wagon)

Engine: 2.0L Turbo (EJ205)



Mi: 5,099

Mi on Car: 15,162

Sample Start: 09/24/04

Sample Date: 12/28/04

Brand: M1 T&SUV

Viscosity: 5W-40

Filter: Stock

Make-Up (qt): 1/2



Aluminum 4

Chromium 1

Iron 6

Copper 5

Lead 1

Tin 0

Molybdenum 8

Nickel 1

Manganese 0

Silver 0

Titanium 0

Potassium 0

Boron 31

Silicon 11

Sodium 2

Calcium 2247

Magnesium 377

Phosphorus 974

Zn 1139

Barium 0



SUS@210 68.9

cST 12.7

Flashpoint 365

Fuel % 0.5

Antifreeze % 0.0

Water % 0.0

Insolubles % 0.5

TBN 4.3

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Notes:
* My daily commute is 60 mi total round trip in San Francisco East Bay. Traffic is usually slow but in many instances can get up to 75mph. Highway is not straight but have some up and down slopes.
* Stock filter is made in Japan by Toyo Roki.
* This is my first time with M1 T&SUV. Car was broken in with dino until 10k miles, with the previous 2 runs on Chevron 10W-40.
* Car has Cobb AccessPort Stage 1 ECU mod. It does detonate a tiny bit at full throttle and it should be fixed soon. Otherwise I will consider taking it out.

Overall it looks fine in terms of wear, but 0.5 qt was added about 4000 mi into the interval.

A question regarding the flash point of 365F. I played with the sample by putting it in a freeze for a day, and then it has been left on my table for 1 month before I sent the sample in. Could this have contributed to the flash point?

M1 datasheet shows 14.8 cSt @100C so it has thinned about 14%. Insolubles and fuel seems normal for WRX.

and I had an accident 3 days after taking this sample. Car is being fixed and should be back on the road next week...

 

[Palut]

That looks like a good report. How badly was the car damaged in the accident?

 

[Alan]

How was MPG's compared to the Chevron 10W40 runs?

 

[ekpolk]

Jackpot! It looks like you've found a good one for your WRX. Although I have not done a detailed study of WRX UOAs, but my impression is that this engine is finnicky about oil, and will turn in less than optimum results if fed the wrong stuff. Of course, this is just an impression that could be very wrong. Another explanation for some of the other less stellar WRX UOAs might simply be over-enthusiastic driving (no, that would never happen in a WRX...). At any rate, if I were a WRX owner who was displeased with how my current oil was performing, TSUV would certainly go on my list of "must try" choices. Thanks for posting your data.

 

[SilverGGA]

quote:

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Originally posted by Palut:
That looks like a good report. How badly was the car damaged in the accident?

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It was just body damage, and a few panels on the passenger side needed to be replaced. No engine or frame damage. But with the labour rate in the Bay Area things add up pretty quickly...

quote:

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Originally posted by Alan:
How was MPG's compared to the Chevron 10W40 runs?

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MPG with T&SUV has no noticable difference compared to Chevron 10w-40. It has been about 22-23mpg with my commute and the way I drive.

 

[TEXDOG]

oil sheared more than is desirable. some of the better oil minds may want to comment on this.

 

[buster]

Certainly not a bad report, but like TEX said, might want to ask someone esle about this. Wear levels are great.

 

[rugerman1]

First run of SUV
First UOA on the engine
Engine barely broken in
ECU mods?
I suggest trending with follow-up samples.
Best results are after multiple runs of the same oil.

 

[Geoff]

Excellent results. I'd stick with this oil and be done with it.

 

[Whimsey]

quote:

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Originally posted by SilverGGA:


A question regarding the flash point of 365F. I played with the sample by putting it in a freeze for a day, and then it has been left on my table for 1 month before I sent the sample in. Could this have contributed to the flash point?

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I've noticed other UOA's here using Mobil 1 5W-30, different than your case I know, that also had seemingly unexplainabely lower flash points. And yet like your report there were no tell tale signs as to why

. And the wear numbers were real good like your's. Perhaps it's something do due with Mobil 1 in general. Since it hasn't affected your wear numbers I wouldn't worry about it.

Whimsey