Maintaining Audi CPO Warranty

For those of you with CPO vehicles, what do you have to do to maintain CPO status.

For example, I do all the work on my current vehicles: oil changes, oil filter, spark plugs, etc. You get the gist, normal maintenance. I've never had a dealer service department touch my cars for anything other than recall work.

I'm looking to buy a CPO A5 this week and was wondering if I did the scheduled maintenance service and oil changes myself, or at somewhere other than a dealer, would I lose my CPO warranty?