Cream the margarine, peanut butter, sugar and brown sugar in a mixer.
Add eggs and vanilla. Mix. Combine the flour, oatmeal, baking soda and salt and add to the cream mixture.
Add chips to dough and mix by hand.
Using a cookie scoop (or just a spoon!) scoop dough into balls (about 1") on a cookie sheet about 2″ apart. Just slightly flatten dough balls.
Bake at 350 degrees for 10-12 minutes. Let cookies sit on pan for 3-5 minutes after baking for easy removal from pan.