Stock,Hi volume pump ? Stock or increased rod/ main clearances? Standard oil with the Lucas break in additive has worked for me. I usually change the oil,after the 30-45 minute break in (what has worked for me). Thinking 10-40 or 15-40 Deli/Rotella standard clearances,20/50 for looser bearing clearances. Synthetic after the rings seat. Let's see how others chime in. FWIW, Valvoline VR1 non street legal oil,will have the zinc additives in the oil,check O'Reilly's.
