Welcome! I have probably seen you around since I work around Falls Church and see quite a few PGs.
220 is pretty normal. An oil cooler will definitely bring the temps down, otherwise there really isn't much you can do. For street driving you don't really need to worry about getting an oil cooler. For any track use or extended spirited driving you'll want to invest in one.
You should come out and hang with us on Saturdays (alternating between Fairfax and MD) for coffee and car talk. Check our meet thread out here:
NOVA: Zs & Coffee - Starbucks every Saturday @ 10AM
We're meeting in Columbia, MD this weekend.