As some of you may have read before, I am rebuilding the engine in my truck. Getting close these days if I could get off work at a half way normal hour I could get a lot more done....

My question is do I need to put break in oil in my engine for a while before putting in regualr oil? We always run break in oil for 100 hours in new or rebuilt engines that we build, but I have never heard anybody on here talk about it. What do you guys run on a new engine? I know the factory breaks in the engines when they are brand new so we dont have to worry about that, but in my case its going to be up to me to do it.

Thanks for any input guys!