I appreciate all the feedback.
I still can't see anything special about the break in oil other than high zinc/phosphorus levels... well, high when compared to todays oils.
Royal Purple is pretty straightforward in what you get:
Royal Purple has addressed this issue with their new break-in oil. Royal Purple combines highly refined mineral oil, preferred for engine break-in, with advanced additives containing high levels of zinc and phosphorus to optimize protection in flat-tappet and roller engines. (sounds like 30wt straight mineral oil and a bottle of ZDDP)
I'm sure every oil mentioned so far will work and do a fine job of protecting the cam/lifters and seating the rings....
For day to day I can't see a need for anything exotic.... a good 15W-40 is all I plan after break in.
