So a new gm goodwrench tbi engine is about to be installed but the manual that came with the engine says nothing about breaking it in. I found a break in procedure from gm for there 290hp crate engine. I am going to do that break in procedure on this tbi engine. The break in procedure states not to use synthetic oil for break in just a standard non synthetic 10w30. I was going to use delo 10w30 xle but i noticed its a synthetic blend. Is that oil ok to use or should i just use pyb 10w30 or something? i was going to use the delo because the voa indicate a higher amount of zddp that would be good for break in.