On more tid bit, I always change the oil filter after the 20 min cam break-in. If its a spin on filter I change the filter then cut the can off using a panel ripper on the air hammer (makes a clean cut - no fillings) and inspect the filter material with a magnetic. The oil itself can stay in . I usually give the engine a couple of 3/4 throttle runs with cool down in between to seat the rings then drive lightly for 500 miles. Change the oil and filter then its good to go. With modern clyinder wall finishes and a moly ring they are pretty much seated after 500 miles.
