Showing my old school fool self here. Years ago, a new car came with break-in oil. Then they quit the practice, now we're back at it. The more things change, the more they stay the same.
Recommend a lightweight mineral oil, say a 5w-20 or even a 10w-30 will do. Use the ZDDP additive. Do not leave in for more than 100 hrs of operation. The oil is still slick, but it has a bunch of crud in suspension that the filter is not getting. Switch to normal lube with ZDDP added for the first change. Use ZDDP afterwards as desired at oil changes.
I do not recommend a synthetic oil for break in. The stuff is slicker than snot on a doorknob and will not allow the rings to set properly. After the break-in period, feel free to use it.