synthetic oil question (not starting anything)

[Dust]

I read in some of the posts that the Synthetic Oils result in more leaks. Is this true on a new bike also, or just after they have 5000mi+ on them? Why is this so? What quality makes this happen that it doesn't happen with conventional oils? Truly hope this doesn't start anything else. Just looking for answers. Dust A14 "Rhino" Man with BIG Grin (and no leaks..........yet) currently using conventional oil, but planning on switching to Bogdan's choice @ 3000 miles