Pretty happy with this one overall. Will extend it to 60K on the next run.
Make/Model: GM Rear Differential
Vehicle: 2004 Chevy 2500HD
Code:
OIL SVG 75w90 SVG 75w90 VAL Syn 75W90
MILES IN USE 50,070 39,780 29,976
MILES ON UNIT 196,200 146,130 106,350
SAMPLE TAKEN 8/16/16 7/3/13 10/20/11
MAKE UP OIL 0 0 0
ALUMINUM 2 0 2
CHROMIUM 0 0 1
IRON 77 99 170
COPPER 0 0 1
LEAD 1 0 1
TIN 0 0 0
MOLYBDENUM 0 0 0
NICKEL 0 2 2
MANGANESE 2 2 4
SILVER 0 0 0
TITANIUM 0 0 0
POTASSIUM 1 0 0
BORON 96 125 305
SILICON 22 15 4
SODIUM 3 3 4
CALCIUM 5 5 10
MAGNESIUM 1 0 2
PHOSPHORUS 829 893 2169
ZINC 7 10 17
BARIUM 0 0 0
CADMIUM 0
VANADIUM 0
ANTIMONY 0
LITHIUM 0
SUS @ 210F 86.0 76.2
Visc @ 100C 17.01 16.9 14.56
Flashpoint 410 375
Water % 0.0
Insolubles % 0.1 0.3
TAN 2.5 2.03
Oxidation 45
Nitration 4
Oil Analysis Vendor Comments:
The viscosity was a little thicker than expected in this sample, but if that was a problem for the differential, it certainly doesn't seem like it. Wear metals are lower than last time, depsite the longer run -- who can complain about that? No water turned up and insolubles read at just 0.1%. The TAN read 2.5. A longer interval should be no problem. Try about 60K miles for next time. Nice report!
Make/Model: GM Rear Differential
Vehicle: 2004 Chevy 2500HD
Code:
OIL SVG 75w90 SVG 75w90 VAL Syn 75W90
MILES IN USE 50,070 39,780 29,976
MILES ON UNIT 196,200 146,130 106,350
SAMPLE TAKEN 8/16/16 7/3/13 10/20/11
MAKE UP OIL 0 0 0
ALUMINUM 2 0 2
CHROMIUM 0 0 1
IRON 77 99 170
COPPER 0 0 1
LEAD 1 0 1
TIN 0 0 0
MOLYBDENUM 0 0 0
NICKEL 0 2 2
MANGANESE 2 2 4
SILVER 0 0 0
TITANIUM 0 0 0
POTASSIUM 1 0 0
BORON 96 125 305
SILICON 22 15 4
SODIUM 3 3 4
CALCIUM 5 5 10
MAGNESIUM 1 0 2
PHOSPHORUS 829 893 2169
ZINC 7 10 17
BARIUM 0 0 0
CADMIUM 0
VANADIUM 0
ANTIMONY 0
LITHIUM 0
SUS @ 210F 86.0 76.2
Visc @ 100C 17.01 16.9 14.56
Flashpoint 410 375
Water % 0.0
Insolubles % 0.1 0.3
TAN 2.5 2.03
Oxidation 45
Nitration 4
Oil Analysis Vendor Comments:
The viscosity was a little thicker than expected in this sample, but if that was a problem for the differential, it certainly doesn't seem like it. Wear metals are lower than last time, depsite the longer run -- who can complain about that? No water turned up and insolubles read at just 0.1%. The TAN read 2.5. A longer interval should be no problem. Try about 60K miles for next time. Nice report!