jenna found a manual on-line that called for 700mm of 20w-40. It's GA, seemed better to go to the warm end of things and use 20w-50 rather than 10w-40.
I hear ya on those crank bearings. The oil was pitch black so it was old but it wasn't milky. I don't think there was any water in the bottom end. Jenna drained it into a pan then poured it into the oil catcher looking for shavings. She said it looked good. So far I haven't seen anything to think there's anything wrong with the bottom end.