I think to remember having read somewhere that back in the days there was no such thing as break in oil because the regular oil was good enough for the job. I guess because of the way higher ZDDP content it had back than. So lets say i got a conventional 10w30 oil with high zddp (specifications like back than) would it be possible to use this not only for regular driving but also for break in? Or did i got something wrong here? Dont have an engine to break in at the moment. It just interests me.