Oil analysis results
I'll not be extending the interval past 13,000 for the record. I do it when the computer says so.
Last edited by LILBENZ230; Mar 26, 2011 at 07:25 AM.
Considering the mileage on your car AND the paper filter, those are pretty good results. Though, I always cringe at the iron numbers from M1.
I thought you did a lot of long highway trips normally, but did you do a bunch of short trips this time? I am just thinking about the fuel dilution.
What always has puzzled me, is in your car the M1 doesn't seem to shear like it does in every analysis I have seen. Out of the bottle M1 has a viscosity of 13.33. I suspect it is shearing in your engine, but then thickening again as it oxidizes. I wish Blackstone included TBN in the standard test, as that would help solve that mystery. That is why I prefer Oil Analyzers, because they include TBN for the same $25.
Hope Glyn will chime in here. I would like to see him comment on the Manganese numbers that creeped up on this report. The virgin oil has 0, so this must be a wear particle.
M1 0W-40 is definitely an excellent oil, just wish it could control iron a little better. I will be sending in my analysis of Pentosin next week. I am hoping it performs as well as M1, but with a reduction in iron.
Last edited by johnand; Mar 26, 2011 at 10:14 AM.
But I think this shows that there is nothing wrong with the 13000 mile interval. Maybe if you live in very dusty areas or something, but if you live here in GA, spend a lot of time on the road, and are changing your oil every 5k miles you are throwing money away.
I drove 800 miles last night to visit Drew in Florida.. I'm at 107k and it's time for another change.
question do you idle the car alot??? the short trips might be why but water was ok so you got it hot enough
everything else looks ok

Sources of Manganese:
Manganese (Mn) can show up in the following components of an engine as:
Minor element:
Wrist pin & bushing
Piston rings-various
Blowers
Trace element:
Gears-misc.
Crank shaft
Cam shaft
Cam follower
Valve train & valves
Cylinder liner (unlikely with Benz Alusil)
Roller/ball bearings-various
Minor element- medium concentration range relative to a Major element. Appx. 20-50% of a major element
Trace element- very low concentration relative to Major & Minor elements. May no show up in a concentration high enough to register above instrument detection limits.
I'm of the opinion that the majority of the Manganese found in Matt's sample is from the fuel. Afton Chemical (formally Ethyl Corp) supply the US & Canadian fuel industry with Octane boosters containing Mn.
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EDIT: I take that back. I got it, but it didn't come to my phone... hmm.
Last edited by bdgdl08; Mar 27, 2011 at 12:37 AM.



