Ok I posted yesterday that i have a CEL on and the code is
P0135 Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

later the same day I got an beeping alarm from the dashboard about the Oil.
It came on for a few seconds and went off. It came on again 20 minutes later.
I checked the computer readout and it said everything was ok but i decided to put a quart of oil in it assuming thats what it need. It seemed ok for like another 120 miles but today it came on again.

Are these problems possibly related? Does it make sense to pay an Audi dealer to look at it?
I am still covered under a short warranty from the place i bought it from so i would like to make sure i get all problems fixed before it runs out. Does anyone have any input on how to diagnose / fix these problems the best way?