Originally Posted by Romer
We could also create a place to post Oil analysis results. Interested in the forum members thoughts
I'll start, here are my 4 results, got one more comign soon, not bad but not near as good as this engine is capable of. Bearing wear is about twice as high as average but trending down. Best guess I have come up with is that this is old minor bearing wear that is settling down from a K&N filter that the PO was running. That is likely to be right as it is wrong.
Note M1 mix is mainly Mobil 1 SS 10w-30 with a few quarts of 15w-50 to raise the viscosity; I use this in the winter.
One thing to remember about looking at these numbers is the miles on the oil, the more miles the higher the number will be
Code:
oil miles 5,491 6,362 3,948 5,200 Unit 1FZ-FE
unit miles 131,878 126,407 120,045 116,100 Average Average
Date 6/9/05 3/4/05 11/13/04 9/11/04 5,250 5k miles
oil M1 0W-40 M1 mix M1 15w-50 Delvac 1 miles
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Aluminum 2 2 2 2 2 2
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Chronium 1 0 0
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Iron 9 7 4 7 7 7
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Copper 1 1 1 4 2 3
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Lead 5 7 4 9 6 3
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Tin 1 1 1 5 2 1
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Molybdenum 72 56 58 1 47 41
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Nickel
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Manganese
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Silver
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Titanium
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Potassium 1 4 2 1
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Boron 139 110 115 21 96 50
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Silicon 8 6 8 12 9 9
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Sodium 3 3 3 3 3 4
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Calcium 3123 2142 2760 2242 2617 2448
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Magnesium 19 15 66 439 135 72
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Phosphorus 862 763 1139 1026 925 857
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Zinc 1089 835 1295 1209 1107 1041
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Barium
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Vis@ 210°F 67.8 66.9 84.7 74.8 73.5 varies
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Flashpoint°F 410 365 385 385 385 >375
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Fuel <0.5 <0.5 <0.5 0.5 <0.5 <2.0
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Antifreeze
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Water 0 <0.1
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Insolubles 0.3 0.4 0.4 0.3 0.35 <0.6
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TBN 3.7
Blackstone comments in order
116,100 miles
RAVEN: Lead (bearings) was mildly high in the first sample from your Lexus, though this is the only
wear metal out of line. The universal averages column shows typical wear from this type of engine
after 4,800 miles on the oil. This level of lead isn't high enough to show a major problem, but will be
something to keep an eye on in future samples. It could be related to the fuel dilution we found. 0.5%
is not high enough to call a problem and may be normal if you do a lot of city driving or idling.
Everything else looks great. Suggest staying at 5,000 miles on the oil for now.
120,045 miles
RAVEN: We found a nice improvement in lead this time with the shorter oil use. All other wear metals
were lower than your last sample, and generally lower than the universal averages for this type
engine, which are based on a 4,900 mile oil use. No significant (<0.5%) fuel was found this time, and
the sample was free of water and antifreeze. Insolubles (oil oxidation due to heat, use, and blow-by)
were normal at 0.4%, showing good oil filtration. The low silicon count shows that air filtration is
working well. Suggest running 4,000-4,500 miles for the next sample.
126,407 miles
RAVEN: Even with mixing of oil types and grades, your viscosity stayed in the normal range for a
10W/30, and would be okay for a 10W/40 as well. The only variance we are seeing in wear sample to
sample is the lead amount, which is back up to a high reading in this oil, which was run 6,263 miles in
the engine. There were traces of gas in the oil though not enough to typically hurt anything. We can't
tell you why lead reads as it does, but we'd feel more comfortable if it read at an average 2-ppm. The
TBN was 3.7, so lack of TBN is not the problem.
131,878 miles
RAVEN: Nice improvement in lead. We are not sure what's causing it to increase and decrease --
maybe it's your driving habits. In any case, it's not really hurting anything, even when it's reading high.
Other wear looks good and shows no changes that would indicate a new problem in your Lexus. No
moisture, fuel, or coolant was present in this sample. The viscosity was normal for Mobil 10W/40 oil.
Insolubles were fine at 0.3%, showing good oil filtration and complete combustion. Your engine is
looking good at 131,878 miles. Try going back to 6300-6500 miles next time.