haha penrite is recycled too. i think your a little confused, there is no point putting good oil in after a rebuild as you need the engine to bed in (wear-in). i am an advocate for good oil but not for running in.... trust us cheap shit for run-in gulf western, GTX etc is the BEST thing to put in your mega dollar build not some $100 boutique oil.
but seriously i have built $20,000 engines and run them in on gulf western.... and never had even one play up (build about 4-6 engines a month). Change filter after about 20-40mins of running. and top up. Put the good stuff in after about 600km and DO NOT BABY THE CAR, drive it normally but keep revs under control..