This is the latest UOA from my 2003 330Ci BMW transmission.
This was about 60% new D4 fluid and 40% from the factory fill.
I don't have a TAN on my VOA of the D4 fluid. Fluid was changed with D4 and the filter was replaced this time. The pan was pretty clean, just a little grey gunk on the magnets.
It seems to shift better with the D4.
Code:
Factory Fill 60% D4
40% Factory fill
Miles on oil 63900 17100
Total miles 63900 81000
Date 11/25/2008 01/15/2010
Make up oil 0.0
Oil Brand Esso Red Line
Type LT 71141 D4
Filter NA changed
ALUMINUM 62 54
CHROMIUM 0 0
IRON 88 63
COPPER 96 71
LEAD 27 15
TIN 7 5
MOLYBDENUM 0 1
NICKEL 1 0
MANGANESE 10 6
SILVER 0 0
TITANIUM 0 0
POTASSIUM 1 2
BORON 83 145
SILICON 11 11
SODIUM 10 9
CALCIUM 33 57
MAGNESIUM 2 2
PHOSPHORUS 260 384
ZINC 8 13
BARIUM 1 1
SUS @ 210F 48.8 49.3
cSt @ 100C 6.9 7.07
Flashpoint F 405.0 430
Fuel % -
Antifreeze % -
Water % 0.0 0.0
Insolubles % TR 0.0
TBN
TAN 1.5 3.1
Blackstone coments:
The viscosity of this sample was normal for an ATF, measuring in the SAE 10W range. This oil
was only in use for 17,100 miles and wear metals decreased overall. The wear rate (ppm/mile) was a bit
higher than before but you always get carryover metal from the previous oil since you only changed about
65% of it. So, as far as wear is concerned, everything looks good at 81,000 miles. The oil's TAN was 3.1,
fairly acidic in nature, but with wear looking good, we don't think it's a problem level. No moisture was found
and no insolubles were present in this sample.
This was about 60% new D4 fluid and 40% from the factory fill.
I don't have a TAN on my VOA of the D4 fluid. Fluid was changed with D4 and the filter was replaced this time. The pan was pretty clean, just a little grey gunk on the magnets.
It seems to shift better with the D4.
Code:
Factory Fill 60% D4
40% Factory fill
Miles on oil 63900 17100
Total miles 63900 81000
Date 11/25/2008 01/15/2010
Make up oil 0.0
Oil Brand Esso Red Line
Type LT 71141 D4
Filter NA changed
ALUMINUM 62 54
CHROMIUM 0 0
IRON 88 63
COPPER 96 71
LEAD 27 15
TIN 7 5
MOLYBDENUM 0 1
NICKEL 1 0
MANGANESE 10 6
SILVER 0 0
TITANIUM 0 0
POTASSIUM 1 2
BORON 83 145
SILICON 11 11
SODIUM 10 9
CALCIUM 33 57
MAGNESIUM 2 2
PHOSPHORUS 260 384
ZINC 8 13
BARIUM 1 1
SUS @ 210F 48.8 49.3
cSt @ 100C 6.9 7.07
Flashpoint F 405.0 430
Fuel % -
Antifreeze % -
Water % 0.0 0.0
Insolubles % TR 0.0
TBN
TAN 1.5 3.1
Blackstone coments:
The viscosity of this sample was normal for an ATF, measuring in the SAE 10W range. This oil
was only in use for 17,100 miles and wear metals decreased overall. The wear rate (ppm/mile) was a bit
higher than before but you always get carryover metal from the previous oil since you only changed about
65% of it. So, as far as wear is concerned, everything looks good at 81,000 miles. The oil's TAN was 3.1,
fairly acidic in nature, but with wear looking good, we don't think it's a problem level. No moisture was found
and no insolubles were present in this sample.