From reading and research, it appears I might have a cracked block. (Milky
oil and condensation by the filler cap) Now my problem lies in determining
if in fact that is the case. What tests / areas do mechanics look at to
determine a cracked block? I have a reliable mechanic but still I heard
it's hard to determine that anyway. I know it might be a gasket or
something but i'm looking worst case.

Thanks!