Are you running pumps?
Assuming they’re good, reliable engines, you should be able to anticipate their oil consumption. Do they have low oil pressure shutdowns?
Agreed. We kept logs on those engines I mentioned. The Cummins would basically not use any oil between changes. The Cats would use a quart or two every 24 hrs. We could just idle them down and add that much, but the "higher ups" wanted us to rotate them.