Just back from a 2000 mile tour around France with my 3.0 BiTDi. Fantastic car. One question however:

Now done 28k miles, first service was at 21k. After the service I checked the oil level on the MMI display and noted it was below the full mark, around 3/4. I checked a few days afterwards and it was the same. Interestingly the Audi dealer who serviced it didn't put it back on an extended service interval despite my request.

Anyway, I have now checked again, 7k miles later and find the oil level to be up to the maximum level. Now, we have a diesel Volvo in the family and I know they are prone to oil level increasing due to unburnt diesel finding its way back into the sump as a result of the DPF regen process. (This was subject to a Volvo recall I believe, and advice on oil changes is now to fill to the 2/3 mark, to avoid triggering a fault warning light).

So my question, is the Audi 3.0 BiTDi prone to this as well? Mine seems to run a lot of DPF regen cycles despite being a high mileage car. Does this have anything at all to do with the apparently increasing oil level?

Any thoughts anyone?