Make/Model: GM Differential
Vehicle: 2004 Chevrolet Tahoe
Fluid was changed and refilled with same type. Will likely try to get another 10K out of the next fill.
Blackstone comments:
This sample is looking pretty good. Wear metals are holding quite steady compared to last time, and that's nice to see, but it's especially nice on a longer oil run. Iron is below average on a longer-than-average oil run, and that's great. It's especially reassuring after that high reading you had in your first sample. Maybe that was just caused by a really long oil run or something operational/situational. The silicon is probably from sealers and that's nothing to be concerned about. Insolubles are low and the TAN is fine. No serious problems here.
Code:
OIL Amsoil 75w90 Amsoil 75w90 Unknown
MILES IN USE 35,159 25,128 Unknown
MILES ON UNIT 183K 148K 123K
SAMPLE TAKEN 4/16/15 3/18/13 5/3/11
MAKE UP OIL 0 0 0
ALUMINUM 2 3 4
CHROMIUM 1 1 2
IRON 264 255 672
COPPER 5 7 28
LEAD 0 0 1
TIN 0 0 0
MOLYBDENUM 1 0 3
NICKEL 4 4 11
MANGANESE 6 6 26
SILVER 0 0 0
TITANIUM 0 2 0
POTASSIUM 0 0 0
BORON 93 100 179
SILICON 145 162 13
SODIUM 5 6 34
CALCIUM 5 9 42
MAGNESIUM 2 3 3
PHOSPHORUS 884 913 1683
ZINC 13 21 68
BARIUM 0 0 1
SUS @ 210F 83.2 88.3 69.0
Visc @ 100C 16.31 17.57 12.70
Flashpoint 400 415 370
Water % 0.0 0.0 0.0
Insolubles % 0.2 0.5 0.2
TAN 1.4 1.8 NA
Vehicle: 2004 Chevrolet Tahoe
Fluid was changed and refilled with same type. Will likely try to get another 10K out of the next fill.
Blackstone comments:
This sample is looking pretty good. Wear metals are holding quite steady compared to last time, and that's nice to see, but it's especially nice on a longer oil run. Iron is below average on a longer-than-average oil run, and that's great. It's especially reassuring after that high reading you had in your first sample. Maybe that was just caused by a really long oil run or something operational/situational. The silicon is probably from sealers and that's nothing to be concerned about. Insolubles are low and the TAN is fine. No serious problems here.
Code:
OIL Amsoil 75w90 Amsoil 75w90 Unknown
MILES IN USE 35,159 25,128 Unknown
MILES ON UNIT 183K 148K 123K
SAMPLE TAKEN 4/16/15 3/18/13 5/3/11
MAKE UP OIL 0 0 0
ALUMINUM 2 3 4
CHROMIUM 1 1 2
IRON 264 255 672
COPPER 5 7 28
LEAD 0 0 1
TIN 0 0 0
MOLYBDENUM 1 0 3
NICKEL 4 4 11
MANGANESE 6 6 26
SILVER 0 0 0
TITANIUM 0 2 0
POTASSIUM 0 0 0
BORON 93 100 179
SILICON 145 162 13
SODIUM 5 6 34
CALCIUM 5 9 42
MAGNESIUM 2 3 3
PHOSPHORUS 884 913 1683
ZINC 13 21 68
BARIUM 0 0 1
SUS @ 210F 83.2 88.3 69.0
Visc @ 100C 16.31 17.57 12.70
Flashpoint 400 415 370
Water % 0.0 0.0 0.0
Insolubles % 0.2 0.5 0.2
TAN 1.4 1.8 NA
