I did my first at 2000 miles and had Blackstone Labs do a used oil analysis. It came back good. Sure, it had elevated wear metals and silicone, but that's normal. They weren't as high as I thought they'd be, and the oil itself was in good shape, showing no shearing. It was still in the 20 weight range. I went to Mobil 1 Extended Performance 0w20 for the next run, and just changed it out after about 3275 miles. I sent a sample to Blackstone for another analysis. I didn't see any shavings in the oil filters either time, but I didn't look with a microscope, either. I filled it with Mobil 1 Annual Protection 0w20 and will run it until early October, no matter what the mileage. I suspect it will have 5k or so on it by then, maybe a little more. I'd run it until the oil life monitor says to change it, except that I'm going to Moab and want a fresh oil change before I go.
I'll share the next oil analysis result when it comes. It may be interesting. I pulled the filter before capturing the sample, so it is possible that some crap came off of it and drained into the sump. It will still have elevated wear metals, either way. I expect that until about the 4th oil change, or 20k miles. It should be fully broken in and flushed out by then, and will have settled into it's pattern for the long haul.