I would just keep the oil and filter changed and USE GOOD FILTERS. ACDELCO GOLD, Mobil1, K&N, etc. are the best filters made. Make sure you use them. You should be fine as long as you're not continuing to find metal in the oil. I would suggest after the next oil change, get a small container, capture the oil and send it out for testing.
This is good site for that.
http://www.bobistheoilguy.com/