So the old girl is getting alittle long in the tooth, well over 180K on the clock. Noticed she's starting to burn more than a little oil. Not sure exact quantities, but I do notice on still, cool days, I see a little puff of "blue" in the rear mirror when I pull away. I wonder if this means the turbo fairy is due a visit! So how much oil do other S4's go through, per 10K?