Well Bob, the guy racing at pro level only need worry about his engine lasting 30 minutes plus 2 laps. I'm thinking I want mine to last a little bit longer than that. But everyone has different requirements..
The break in would/should be the same. Expected life has nothing to do with it, and everything. A lot of the over kill does more harm than good. Some of my older theories bordered on human sacrifice! It did not help. Keeping it simple works very good.