From Blackstone Labs
The oil's viscosity was just light of the 5W/30 range and the TBN read low enough that we think the 7,667-miles you've put on the oil are enough for this type. Silicon and aluminum came up on the high side of the normal range. If the wear is due to silicon, you may want to take a look around your air filtration system. Any leak could let abrasive dirt in to abrade the piston tops (aluminum). Wear otherwise was normal and we don't think the 7,000+ miles on the oil was too long. If you could get rid of the high silicon you could probably run longer oil change intervals.
MANGANESE 2
ALUMINUM 7
CHROMIUM 0
IRON 17
COPPER 10
LEAD 2
TIN 2
MOLYBDENUM 80
NICKEL 0
SILVER 0
TITANIUM 0
POTASSIUM 0
BORON 52
SILICON 30
SODIUM 18
CALCIUM 2280
MAGNESIUM 11
PHOSPHORUS 679
ZINC 771
BARIUM 0
MI/HR on Oil 7,667
MI/HR on Unit 21,250
Make Up Oil Added 0
Date sampled 6/23/13
cSt Viscosity @ 100°C 54.4
SUS Viscosity @ 210°F 8.59
Flashpoint in °F 469
Fuel % Antifreeze % 0
Water % 0
Insolubles % .2
TBN 1.1
The original air intake filter with 21,250 miles was damaged, I found and replaced it during this oil change before I received this report. This 7,667 OCI was just shy of 12 months and mostly highway driving. I am happy with all the readings and will continue to run 7500 to 8000 OCI. (Walmart's Super Tech 5W-30 Synthetic)
The oil's viscosity was just light of the 5W/30 range and the TBN read low enough that we think the 7,667-miles you've put on the oil are enough for this type. Silicon and aluminum came up on the high side of the normal range. If the wear is due to silicon, you may want to take a look around your air filtration system. Any leak could let abrasive dirt in to abrade the piston tops (aluminum). Wear otherwise was normal and we don't think the 7,000+ miles on the oil was too long. If you could get rid of the high silicon you could probably run longer oil change intervals.
MANGANESE 2
ALUMINUM 7
CHROMIUM 0
IRON 17
COPPER 10
LEAD 2
TIN 2
MOLYBDENUM 80
NICKEL 0
SILVER 0
TITANIUM 0
POTASSIUM 0
BORON 52
SILICON 30
SODIUM 18
CALCIUM 2280
MAGNESIUM 11
PHOSPHORUS 679
ZINC 771
BARIUM 0
MI/HR on Oil 7,667
MI/HR on Unit 21,250
Make Up Oil Added 0
Date sampled 6/23/13
cSt Viscosity @ 100°C 54.4
SUS Viscosity @ 210°F 8.59
Flashpoint in °F 469
Fuel % Antifreeze % 0
Water % 0
Insolubles % .2
TBN 1.1
The original air intake filter with 21,250 miles was damaged, I found and replaced it during this oil change before I received this report. This 7,667 OCI was just shy of 12 months and mostly highway driving. I am happy with all the readings and will continue to run 7500 to 8000 OCI. (Walmart's Super Tech 5W-30 Synthetic)
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