The idea of a maximum per day seems to come from some of the US health care people, I have never come across it in the UK!
The advice here is always to feed what they will take and if they are draining bottles you need to add another oz. If a baby was breast feeding they would self regulate and while formula feeding is different, ideally there should be a bit left in the bottle so you know they stopped because they were full and not because the food ran out!
Babies are very good at self regulating, my chunky top of the charts refluxers only took about 25oz per day but I've known plenty of smaller babies take a lot more than they ever did!
Laura