I got the RS5 late november/early December. Had like 105k when I got it. Previous owner had oil change, carbon clean, valve cover gaskets, coil packs, and spark plugs just before I got it. I was adding a quart every 1500-2000 miles when the indicator would come on telling me it was getting low. Had audi dealer do oil change at 109k, they said all looked good.
I drive the car 70-80 mile round trip back and forth to work everyday. Since all this mess I been working 7 days a week, car runs great, no problems. I been driving faster then normal with no traffic on the roads. But nothing crazy. I find myself doing 90-100 for up to 10 minutes straight(unusual for me) but I dont rev the motor all that often and def not often enough to be considered abuse.