Engine assembly lube

Grease is baaaad for assembly lube. It wont blend in with the oil and will remain in the bottom of the pan. It can actually clog up the oil pickup if you have enough of it in there.
Many years ago I used a moly lube for engine assembly. Luckily I decided to go with a different cam and found all the lube was still in the engine after a couple hours run time. That lube was pretty thin too compared to regular grease.