Mobil 1 0w-40 7,031oci/97,731mi 2011 Subaru WRX

[Govinator3]

Code:


OIL ASS5w30 ASS5w30 M1EC0w40 M1EC0w40

MILES IN USE 6568 7060 7800 7031

MILES 22.6k 45.4k 90.7k 97.7

SAMPLE TAKEN 10/06/12 10/29/13 2/20/16 7/18/16



IRON 9 6 18 13

CHROMIUM 1 0 0 0

LEAD 0 0 0 0

COPPER 6 4 7 10

TIN 2 0 0 0

ALUMINUM 6 3 6 3

NICKEL 1 0 0 1

SILVER 0 0 2 5

SILICON 15 11 12 11

BORON 91 141 146 93

SODIUM 10 6 10 6

MAGNESIUM 16 12 44 22

MANGANESE 1 0 0 0

CALCIUM 3712 3393 3051 2552

BARIUM 0 0 0 0

PHOS 733 642 911 768

ZINC 778 716 1125 904

MOLY 157 62 81 70

TITANIUM 0 0 0 0

POTASSIUM 11 1 2 3

CADMIUM - - 0 0

VANDIUM - - 0 0

ANTIMONY - - 2 0

LITHIUM - - 0 0



FUEL
VIS 100 9.69 10.71 13.1 13.1

WATER 0 0
COOLANT 0 0 - -

TBN 3.4 5.5 5.43 4.36

Oxidation abs/cm - - 38 38


Here are all my 2011 wrx analysis. The first two are Amsoil signature series using wix 57712 filters and black stone labs. The second two are my second and third oci's with Mobil 1 european car formula 0w-40 with Napa gold 7712 filters and using oil analyzers inc.

I'm wondering if I can get some peoples opinion on the Oxidation numbers. I never had oxidation numbers from blackstone and so far Oil Analyzers has marked those values as red. Here is what they say:
SUGGEST CHECKING operating temperature and fault codes (as applicable). OXIDATION is at a SEVERE level. Drain interval
may be over-extended or unit may be running too hot. Elevated Oxidation causes acid by-products, deposits, and sludge, and
can increase viscosity and wear. FUEL DILUTION is at a MINOR LEVEL. Silver Possibly from solder; Your note was taken into
consideration. Lubricant and filter change acknowledged.

When they say "your note was taken into account" that was me being a bad car owner, I noted that only 2.5-3 qts came out during the oc. My thoughts on "elevated oxidation causes acid byproducts" is that its not really an issue since my TBN is not depleted.

I decided to try Mobil 1 0w40 because of its better HTHS rating and its extreme cheapness when used with the $12 rebates that are always around.

Thanks,
Mike

 

[Popsy]

Higher iron and copper with M1, but can we compare Blackstone analysis with oil analyzers?

 

[Rand]

try keeping tabs on the oil level.. every.~ 500-1000miles.

Running that engine with 3qts of oil can cause high oxidation.

 

[UltrafanUK]

A few too many variables to figure out what is happening, BUT I would try cutting the OCI back to 5K miles whilst not changing the oil type.Also keep the oil at the full mark.
The increased Iron might be due to the fuel contamination, although that's a guess.

 

[Govinator3]

Yeah, I'm practicing a new religion of checking the oil level every 500 mi.

 

[bluesubie]

Yeah, seems plausible that the low oil level would cause oxidation. I don't recall what normal oxidation levels are for this oil. Is it the new FS or the older version? Remind me again. Are you modded?

 

[bigt61]

All your #'s will come down if you keep it topped off. Simple dilution effect.

 

[OVERKILL]

The high oxidation is a false positive due to the base oil used in the product.

 

[Ohle_Manezzini]

Why, is there any acidic base in M 1, to make this confusion?

 

[zeng]

Originally Posted By: OVERKILL
The high oxidation is a false positive due to the base oil used in the product.

I would concur with this observation basing on TBN, KV@100*C and overall wear #s with oxidation #s being on the contratrian.
The used oil looks serviceable to me ..
OP, was the used sample having goldenish/ amberish hue color ?

 

[Al]

Keep your eye on potassium = possible coolant leak

 

[bluesubie]

Originally Posted By: Ohle_Manezzini
Why, is there any acidic base in M 1, to make this confusion?

Esters show high oxidation numbers.

 

[Govinator3]

Sorry about the late reply to the questions, been on a couple vacations. I really appreciate all your comments. I will do some digging to see if I can find a VOA on the M1 0w-40. If not I may send one in if that would be beneficial in determining if it is a false positive for oxidation.

Originally Posted By: bluesubie
Yeah, seems plausible that the low oil level would cause oxidation. I don't recall what normal oxidation levels are for this oil. Is it the new FS or the older version? Remind me again. Are you modded?

I'm not sure what you mean by "new FS or the older version" as far as I know it's a full synthetic and was purchased earlier this year at walmart. I am modded, running Cobb OTS stage 2, cobb short ram intake, perrin catted exhaust. I also had a crawford air oil separator installed durring the last 2 OC's.

Originally Posted By: zeng
Originally Posted By: OVERKILL
The high oxidation is a false positive due to the base oil used in the product.

I would concur with this observation basing on TBN, KV@100*C and overall wear #s with oxidation #s being on the contratrian.
The used oil looks serviceable to me ..
OP, was the used sample having goldenish/ amberish hue color ?

I'm going to go with black. Like if you had it in a clear bottle you would not get any light transmission through it. But that has been the case for every oil change I have performed on the car.

Originally Posted By: Al
Keep your eye on potassium = possible coolant leak


Yeah someone had mentioned coolant when I posted my first analysis, Within the first year of owning the car I found the coolant reservoir nearly dry so I topped it off, but it has been 3 years now since I last topped it off so maybe there was a pinhole that sealed up?

Thanks,
Mike

 

[Govinator3]

well what do you know someone just posted it but it was with Blackstone so no oxidation data

http://www.bobistheoilguy.com/forums/ubbthreads.php/ubb/showflat/Number/4028326/gonew/1/Mobil_1_M1_0W-40_%22FS%22#UNREAD

And a little searching showed me that there as a formula change in March 2016 so I will have to confirm what I used, I think I still have the jug with the used oil in it.