DIY - but change it as often as possible. Once you get into the routine, it's really pretty easy and you'll feel better knowing the blood in your horse is fresh.
And, on a new motor, I'd change it ASAP!!! You've quite possibly got some metal debris in there...casting shavings, fragments, little bits of this and that.
Avoid Fram oil filters-studies done prove this is a piece of crap) and stay away from full synthetic til your next oil change to allow your engine to completely break in.
Motorcraft oil filters are good. I use the K&N oil filter simply because of the nut on the end that makes it easier to remove. I also use Mobil 1 0w-20 in both GTs.