This is my 5th oil analysis on this truck which I've owned since new. All of the analysis' have been done by Oil Analyzers Inc. My previous analysis' have been posted on this site. The most notable number on this analysis is the copper amount of 54. Previously, 14 had been the highest number for copper. The analyst indicated on the report that the oil was suitable for continued use and did not mention anything about the copper number. I called OAI and spoke with a tech person regarding my concern. This person told me that my trucks engine had a copper lined lube cooler and that's where this number was coming from. This person also said that OAI/Amsoil did not consider this number to be excessive for my trucks' engine. I asked why the copper number for the previous 4 samples was relatively low and was told that sometimes the sampling method did not obtain a true sample of a particular item. This sounded like ---- to me. I think I will send my used oil samples elsewhere in the future.
OIL AMSOIL
5W-30 HDD
SAMPLE MILES 9,425
VEHICLE MILES 55,422
SAMPLE PERIOD OCT 06-SEP 07
AMBIENT TEMPS 20's-100°
MAKE-UP OIL NONE
IRON 15
CHROMIUM 1
LEAD 11
COPPER 54
TIN 0
ALUMINUM 2
NICKEL 0
SILVER 0
SILICON 5
BORON 1
SODIUM 0
MAGNESIUM 19
CALCIUM 3774
BARIUM 0
PHOSPHORUS 1281
ZINC 1553
MOLYBDENUM 0
TITANIUM 0
VANADIUM 0
POTASSIUM 0
FUEL (%VOL) VIS @ 40C, cSt NA
VIC @ 100C, cSt 11.57
WATER 0
SOOT/SOLIDS (% WT) 0.1
COOLANT NO
TBN 9.32
OXID 15
NITR 16
F-SOOT 0.01
OIL AMSOIL
5W-30 HDD
SAMPLE MILES 9,425
VEHICLE MILES 55,422
SAMPLE PERIOD OCT 06-SEP 07
AMBIENT TEMPS 20's-100°
MAKE-UP OIL NONE
IRON 15
CHROMIUM 1
LEAD 11
COPPER 54
TIN 0
ALUMINUM 2
NICKEL 0
SILVER 0
SILICON 5
BORON 1
SODIUM 0
MAGNESIUM 19
CALCIUM 3774
BARIUM 0
PHOSPHORUS 1281
ZINC 1553
MOLYBDENUM 0
TITANIUM 0
VANADIUM 0
POTASSIUM 0
FUEL (%VOL) VIS @ 40C, cSt NA
VIC @ 100C, cSt 11.57
WATER 0
SOOT/SOLIDS (% WT) 0.1
COOLANT NO
TBN 9.32
OXID 15
NITR 16
F-SOOT 0.01