Always change your filter when you change your oil.
I changed mine @ 2200 miles because I was about to go on a long road trip. I sent a sample from that change off to Blackstone and all looks good. I replaced the factory fill at that change with Castrol GTX 5W-30 conventional. During the break-in the car used about 3/4 of a quart of oil. I followed the gentle break-in suggestions religiously, but after mile 1,000 rolled on the odo, I started driving the piss out of it.
Just changed again @ 5100 miles and after a ~1200 mile road trip and a lot of hard driving around town, the car didn't lose a drop of oil between 2200 and 5100 miles. I used GTX again for the most recent change. I'll probably go to synthetic at 10k miles.