Here's the latest form my 2017 Corvette Grand Sport's transmission (Tremec TR-6070). GM recommends changing every 15 hours of track use so that's what I did. I might shorten that a bit next time since it's really thinning out, or maybe move to a more stout fluid.
Blackstone said they think things look fine and I largely agree.
Code
OIL ACDelco MTF ACDelco MTF
MILES IN USE 7,623 6,392
MILES 14,015 6,392
SAMPLE TAKEN 10/20/18 9/22/17
ALUMINUM 8 11
CHROMIUM 0 1
IRON 52 82
COPPER 12 22
LEAD 1 1
TIN 0 1
MOLYBDENUM 1 2
NICKEL 1 2
MANGANESE 13 35
SILVER 0 0
TITANIUM 2 3
POTASSIUM 1 3
BORON 96 46
SILICON 9 16
SODIUM 4 9
CALCIUM 21 0
MAGNESIUM 0 1
PHOSPHORUS 234 160
ZINC 7 11
BARIUM 1 3
INSOLUBLES 0.1 0.2
WATER 0 0
FLASHPOINT �F 390 385
SUS VIS 210�F 42.3 43.4
cSt @ 212�F 4.89 5.23
TBN - -
TAN 1.3 1.3
Blackstone said they think things look fine and I largely agree.
Code
OIL ACDelco MTF ACDelco MTF
MILES IN USE 7,623 6,392
MILES 14,015 6,392
SAMPLE TAKEN 10/20/18 9/22/17
ALUMINUM 8 11
CHROMIUM 0 1
IRON 52 82
COPPER 12 22
LEAD 1 1
TIN 0 1
MOLYBDENUM 1 2
NICKEL 1 2
MANGANESE 13 35
SILVER 0 0
TITANIUM 2 3
POTASSIUM 1 3
BORON 96 46
SILICON 9 16
SODIUM 4 9
CALCIUM 21 0
MAGNESIUM 0 1
PHOSPHORUS 234 160
ZINC 7 11
BARIUM 1 3
INSOLUBLES 0.1 0.2
WATER 0 0
FLASHPOINT �F 390 385
SUS VIS 210�F 42.3 43.4
cSt @ 212�F 4.89 5.23
TBN - -
TAN 1.3 1.3