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- Nov 29, 2009
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- 7,216
I just got my used oil report back from polaris labs and it indicated 10% fuel. Yet no excessive wear metals? Viscosity was at 10.9cst at 100C. Right around a 30 weight. This engine has always sheared down to a 30 weight. Ive had used oil samples from blackstone labs done three previous times and had about the same wear metals. they have been slowly decreasing as break in occurs. This last one is higher because I ran 1000 miles more though. I had 20,000 miles on my truck at the time of my report. I guess I should send in my latest sample I took a couple weeks ago when I changed the oil. They didn't even get the sample date correct. I think the 10% is a typo. Either that or blackstone is wrong about their fuel dillution testing methods. This is the 4th uoa on this engine and it has always sheard the oil down to a 30weight. I kind of want a refund on this uoa. I think they forgot a decimal. I would think that the wear metals would reflect the high fuel dilution but according to my previous oil samples the engine wear is pretty normal. Iron is a little higher though but not much. Here are the wear metals and all the other things they flagged. I couldn't put the entire uoa on here so I just put mostly the wear metals and a few other things I thought were weird.
20,665 miles on unit
Miles on oil: 4400
Hours on oil: 200
Iron: 40
Chromium: 1
Copper: 3
Lead: 0? No bearing wear????
Silicon: 4
Sodium: 3
Potassium: 0?
Fuel: >10%
Soot: 0.9% Oxidation: 16 Moderately critical
Nitration: 27 Critical
20,665 miles on unit
Miles on oil: 4400
Hours on oil: 200
Iron: 40
Chromium: 1
Copper: 3
Lead: 0? No bearing wear????
Silicon: 4
Sodium: 3
Potassium: 0?
Fuel: >10%
Soot: 0.9% Oxidation: 16 Moderately critical
Nitration: 27 Critical
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