Break in oil is probably the best bet.
300 miles or so is the norm for new engines.
On old engines with glazed cylinder walls, I have left it in for as long as 600 miles.
That particular time I almost completely eliminated the heavy blue haze emanating from one 5 letter word V8 that I had.
The link is a few messages back regarding blowby.
But for those who missed the link on Blowby
And All Things 'Smoke' Coming Out Of Your Engine,
Here it is again,
-Read up on funny V8 Smoke and how to quite it....
.