This is my second UOA, first for this car, but it can be compared to the UOA on my 00 A4 since they got the same oil and filter, similar driving conditions and they even tracked the seasons almost identically. HERE Bought car with 189k on it, changed at 199k, just turned 200k this past weekend. Mann 940/25 filter, never consumed a drop. Search my posts for the dissection of the filter or the UOA from my 00.
I changed the air filter when I put the oil in and now again at the 10k change. It was a Hengst or Mahle, something OEM or OEM quality. I guess I need to check the PCV and air intake systems for a cause for silicon contamination. Overall, it looks like my 00 fared better.
Comments from analysis tech:
Code:
Universal averages show a typical Audi 1.8L Turbo after about 5,800 miles on the
oil. This sample was in use much longer than that and iron, copper, and silicon read
high by comparison. Iron is from steel parts, copper is from brass/bronze parts, and
silicon could be abrasive dirt or harmless sealers if repairs were made. If silicon is
abrasive, that could account for some of the excess metal. Check the air filter/intake
for issues. The TBN read strong at 2.0 since 1.0 or less is considered low for extended
use. Longer runs will be fine once metals drop. Try 8,000 miles next.
Second column is universal averages
Code:
ALUMINUM 5 5
CHROMIUM 1 1
IRON 35 28
COPPER 14 10
LEAD 1 3
TIN 5 3
MOLYBDENUM 70 71
NICKEL 1 1
MANGANESE 1 1
SILVER 0 0
TITANIUM 0 0
POTASSIUM 0 0
BORON 23 20
SILICON 21 18
SODIUM 11 13
CALCIUM 1028 1297
MAGNESIUM 1360 1097
PHOSPHORUS 1194 1052
ZINC 1456 1251
BARIUM 0 0
values should be
SUS Viscosity @ 210°F 74.3 65-78
cST Viscosity @ 100°F 14.07 11.6-15.3
Flashpoint in °F 390 >375
Fuel %
Antifreeze % 0.0 0.0
Water % 0.0
Insolubles % 0.2
TBN 2.0 >1.0
[/quote]
I changed the air filter when I put the oil in and now again at the 10k change. It was a Hengst or Mahle, something OEM or OEM quality. I guess I need to check the PCV and air intake systems for a cause for silicon contamination. Overall, it looks like my 00 fared better.
Comments from analysis tech:
Code:
Universal averages show a typical Audi 1.8L Turbo after about 5,800 miles on the
oil. This sample was in use much longer than that and iron, copper, and silicon read
high by comparison. Iron is from steel parts, copper is from brass/bronze parts, and
silicon could be abrasive dirt or harmless sealers if repairs were made. If silicon is
abrasive, that could account for some of the excess metal. Check the air filter/intake
for issues. The TBN read strong at 2.0 since 1.0 or less is considered low for extended
use. Longer runs will be fine once metals drop. Try 8,000 miles next.
Second column is universal averages
Code:
ALUMINUM 5 5
CHROMIUM 1 1
IRON 35 28
COPPER 14 10
LEAD 1 3
TIN 5 3
MOLYBDENUM 70 71
NICKEL 1 1
MANGANESE 1 1
SILVER 0 0
TITANIUM 0 0
POTASSIUM 0 0
BORON 23 20
SILICON 21 18
SODIUM 11 13
CALCIUM 1028 1297
MAGNESIUM 1360 1097
PHOSPHORUS 1194 1052
ZINC 1456 1251
BARIUM 0 0
values should be
SUS Viscosity @ 210°F 74.3 65-78
cST Viscosity @ 100°F 14.07 11.6-15.3
Flashpoint in °F 390 >375
Fuel %
Antifreeze % 0.0 0.0
Water % 0.0
Insolubles % 0.2
TBN 2.0 >1.0
[/quote]
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