What oil should I use to break in top end?

[c_dub1984]

Just wondering what oil everyone uses to break in their engines. I plan on using Bel-Ray H1R after it's broke in because I have a ton of it I got off a friend but I heard somewhere full synthetic isn't good to break in a top end.

 

[acezeesawtooth]

I always use the same oil to break in as I'm gonna be running afterwards... but I've also heard of Not using synthetic I plan to run klotz