All the above is good advice, but I would like to add my "2 cents). On a new car, I would chamge the oil in the engine after the first 1,000 miles. The reason being is that all the metallic components are wearing in and genreating a high than usual amount of contaminants.
I would not fret about this too much since you have exceeded this already, but it is a good general policy that I thought others on this BB might want to be aware of. The same goes for the other oils such as differential, but I would not do this until between 5,000 - 7,500 miles.
Oil is cheaper that parts! remember the old Quaker State commercial - You can pay me now or pay me later!
Any comments from the pro's?