FWIW and James.. please correct me if you think I'm wrong, but likely the RMS didn't go. It's more likely the rear cover gasket or an oil pressure sender to dump that kind of oil. The RMS wouldn't have that kind of pressure and supply to kill a motor that fast.

Plus.. Every rear engine cover gasket I've seen, needed to be redone. I don't think I've actually found a RMS leaking. If you grab a new motor, rear engine cover is a must, not a maybe.