thank you. your answer is helpful, but i wondered if you can clarify a couple of things you mentioned:
the 1 turbo engine you know of that was replaced under warranty, was it a 2009, or was it 05-08motor?
how long does it take for the motor to "break in", so i can arrange with the dealer that after X kms, if the oil consumption is more than X mL/10,000km, i want them to fix it. would audi tell me their guidelines for measuring oil consumption?
do you know if same problem exists with BMW 3 series? (so maybe i should buy a BMW instead).