> I've been told that it's not anymore, but that comes from salesmen. The owner's manuals still recommend a break in period. Modern synthetic oils and manufact

> I've been told that it's not anymore, but that comes from salesmen. The owner's manuals still recommend a break in period. Modern synthetic oils and manufacturing tolerances reduce the need to be sure, but there's still a whole bunch of parts built at different plants that have never really worked together before. A bit of controlled wear still makes sense to me.