2015 Audi S5 s-tronic (DSG) factory UOA 12706miles

[Dippy]

Audi recommends change at 38K miles but the DL501 gearbox has a history of problems and the car is 3 years old so I decided to change it early. Everything looks good apart from the TAN. I had a good look on the web to find an expected TAN for the virgin oil (Audi/VW G052-529-A2) but failed, however it seems that ATF oil should start with a TAN of less than 1? If so can anyone suggest that my TAN is as expected or not?

Code:


Iron 23

Chromium 0

Aluminium 1

Molybdenum 0

Copper 3

Lead 0

Tin 1

Nickel 0

Silicon 14

Sodium 9

Boron 30

Vanadium 0

Calcium 58

Phosphorus 372

Zinc 15

Magnesium 2

Barium 0



Viscosity @ 40°C 34.7 cSt

Water Content 0.0 %wt

Fuel Dilution 0 %

PQ Index 19 %

Total Acid Number 2.34 mgKOH/g

 

[Popsy]

Looks ok to me

 

[SubieRubyRoo]

2.34 is still pretty low, especially if Audi uses synthetic fluids from the factory, as they usually have a slightly higher starting TAN. Now that you've gotten most of the initial wear debris out, I don't think there'd be any issues going 38k on your current fill.

 

[Dippy]

Thanks. However as my annual mileage is relatively low I shall likely change it again in 3 years anyway.