The manual lists 7500 or 12 months for oil change in Normal Maintenance Schedule, 3750 miles or 6 month for Severe Usage Conditions Maintenance. The manual lists the "severe conditions", lettered A thru K. Since I and many people will probably drive under one or more of those conditions at some point, I take an ~average of the two, and will change oil at 5k miles. It's easier to remember every 5,000 also.
My first change I did at 3k miles, just because of new engine and I was near the dealer. After that it will be every 5k, unless it's a severe or long winter with short driving trips, or other more frequent "severe" conditions.