For people interested in what not to do check out the ApriliaForum.com thread on what could happen
if you overfill the oil. It's EASY TO DO so read some direction on the forum on how to warm up the bike properly, how much to actually add instead of just filling until you think it's high enough, and how to level the bike and judge when the oil is high enough.
READ THIS THREAD about how to change the oil and what to look out for. It's a lot more involved than you think and I would never take my Aprilia to any dealer for an oil change(besides maybe 3 Aprilia dealerships here in the U.S.). I couldn't see most dealer monkey being able to properly fill the oil in the Dry-sump system.
The best thread I've seen for
changing the oil of your Aprilia Mille. Take your time and make sure you have a few tools ready for your oil change. I recommend getting an Allen socket set for a ratchet. This makes it a lot easier to do the final tightening and loosening of your Allan bolts... and they are all over these Aprilias - MUCH better then Phillips screws thank goodness.