Subaru forester Wix oil analysis with m1 EP 5w30

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Subaru forester N/A 2009 5MT DATE SAMPLED 09-Jan-18 DATE RECEIVED 15-Jan-18 DATE REPORTED 16-Jan-18 UIN 0648C88 TIME ON OIL 6600 Unidentified Unidentified OIL ANALYSIS REPORT LAB NO. 40110812051 SIF NO. 032183 TIME ON UNIT 85737 Gasoline Engine Unit No. Subaru Forester Unit: Make Subaru Model Forester Serial No. Site Compartment: Name Gasoline Engine ANALYST: Sam Smith Portland LEGEND Normal Metals (ppm) Iron (Fe) 13 Chromium (Cr) 3 Lead (Pb) <1 Copper (Cu) 2 Tin (Sn) <1 Aluminium (Al) 3 Nickel (Ni) <1 Silver (Ag) <1 Titanium (Ti) <1 Vanadium (V) <1 Contaminants (ppm) Silicon (Si) 12 Sodium (Na) 9 Potassium (K) <1 Additives (ppm) Magnesium (Mg) 647 Calcium (Ca) 1384 Barium (Ba) <1 Phosphorus (P) 785 Zinc (Zn) 845 Molybdenum (Mo) 100 Boron (B) 47 Contaminants Water (%) <0.05 Coolant No Physical Tests Viscosity (cSt 100C) 11.1 OIL GRADE SAE 5W30 OIL ADDED 1qt FILTER Changed OIL CHANGED Changed WO NUMBER Physical / Chemical Base Number (mgKOH/g) 3.7
 
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Looks good for wear metals. TBN shows once again that M1 EP isn't necessarily a 15K oil. It clearly wouldn't have been for this engine as you used it. How did you use it for this OCI? How about a little back-story?
 
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Originally Posted By: fdcg27
Looks good for wear metals. TBN shows once again that M1 EP isn't necessarily a 15K oil. It clearly wouldn't have been for this engine as you used it. How did you use it for this OCI? How about a little back-story?
How do you know that? TBN wise, that is. XM says their oil will drop to around 2-3 then stay there for another 5-10K.
 
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vjsi

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Half highway, i drive a 100 mile route 2 times a week, because where i work is different than where i spend my weekend. Other than that, maybe i drive about 50 to 80 miles of short trips in the city per week.
 

vjsi

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Well, i didn't like the fact that i was losing oil, so i switched to Rotella t6. I'll try 6k miles and then i'll do another analysis. But I still wonder about the Si being a little high, could it be because of that air filter that i'm using that i posted a link to? Thanks
 
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Originally Posted By: bluesubie
I'd definitely go to 7,500 miles. I doubt the TBN would change much.
Concur with you ... as I'd seen it's residual TBN at 9-13k mile OCI's of 2-3. 15k in OP's subaru ? ..... I won't rule out though.
Originally Posted By: vjsi
....... But I still wonder about the Si being a little high, could it be because of that air filter that i'm using that i posted a link to? Thanks
VOA of EP 5W30 indicates 4-6 ppm of Si. I 'believe' your Subaru air filtration system is performing as it's intended to , no evidence from me though.
 
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Originally Posted By: vjsi
Well, i didn't like the fact that i was losing oil, so i switched to Rotella t6. I'll try 6k miles and then i'll do another analysis. But I still wonder about the Si being a little high, could it be because of that air filter that i'm using that i posted a link to? Thanks
T6 5W-30 or 5W-40? I would've gone with a high mileage oil. Actually, I would've gone with a conventional HM oil since synthetic isn't required.
 
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Originally Posted By: tig1
Originally Posted By: fdcg27
Looks good for wear metals. TBN shows once again that M1 EP isn't necessarily a 15K oil. It clearly wouldn't have been for this engine as you used it. How did you use it for this OCI? How about a little back-story?
How do you know that? TBN wise, that is. XM says their oil will drop to around 2-3 then stay there for another 5-10K.
We all know that TBN decline isn't linear, but it seems a bit hard to believe that an oil that had suffered more than 60% TBN decline in only 6600 miles could somehow hang on for another 8400 miles. I wouldn't bet on this regardless of what XOM marketing people have to say.
 
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Originally Posted By: fdcg27
Originally Posted By: tig1
Originally Posted By: fdcg27
Looks good for wear metals. TBN shows once again that M1 EP isn't necessarily a 15K oil. It clearly wouldn't have been for this engine as you used it. How did you use it for this OCI? How about a little back-story?
How do you know that? TBN wise, that is. XM says their oil will drop to around 2-3 then stay there for another 5-10K.
We all know that TBN decline isn't linear, but it seems a bit hard to believe that an oil that had suffered more than 60% TBN decline in only 6600 miles could somehow hang on for another 8400 miles. I wouldn't bet on this regardless of what XOM marketing people have to say.
The safe way to find out is gradually extending the OCI and peform uoa's accordingly. Oh wait, you're referring to 15k oci's. Never mind. I wouldn't go past 7,500 miles. smile
 
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Originally Posted By: fdcg27
Originally Posted By: tig1
Originally Posted By: fdcg27
Looks good for wear metals. TBN shows once again that M1 EP isn't necessarily a 15K oil. It clearly wouldn't have been for this engine as you used it. How did you use it for this OCI? How about a little back-story?
How do you know that? TBN wise, that is. XM says their oil will drop to around 2-3 then stay there for another 5-10K.
We all know that TBN decline isn't linear, but it seems a bit hard to believe that an oil that had suffered more than 60% TBN decline in only 6600 miles could somehow hang on for another 8400 miles. I wouldn't bet on this regardless of what XOM marketing people have to say.
We haven't seen that according to UOAs. I can't recall seeing TBN lower than 2 for some time even with much higher OCIs. Here's a link. https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/4608743/1/Mobil_1_EP_5W-30,_18,027_mi,_2 And another. https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/4644340/'00_windstar_3.8L_v6_M1_10w30_#Post4644340
 
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