OK...have an oil leak. A pretty good one. 1997 Blazer 6cyl AWD sat over the weekend 3 days. Moved it and found oil under car. Not a whole lot but enough to notice. Looked under and looks like oil commming from the weep hole and the two rubber hoses where the engine and the transmission meet. Is this the dreaded main seal? I think it has been leaking for awhile because the whole underside of the engine has oil on it. Havnt looked hard yet for a leak from valve cover or not. Any advice would be great!