Hi. I own a 2006 Nissan Murano and the engine gave out. My husband has been rebuilding the engine. We have replaced he heads and the transfer case along with seals, axles and bearings. My question is do we need to run a break in oil or additive in it or does it not need it? My husband had rebuilt his engine in his truck and has worked on older vehicles before but the murano is a different beast than what he is used to. Any help would be greatly appreciated. Thank you.