As long as he tolerates it. Like the doctor says, if he isn't spitting it up he will be fine on 5 oz. I was always told when they got a little older to offer one once extra.
Kannon is a preemie when he left the nicu at 2 weeks he was taking 2.5 oz. he went to the doctor two days later she said I can give him another oz as long as he tolerates it and not spitting up. When he turned a month she put him on 4 oz and he's Been on it since but it seems like he's still hungry bc he would suck the paci for two seconds then spit it out (like this is not a bottle) and try to eat on my clothes and face. in two weeks he turn two months I was think I would go up to 5 but I feel like he's taking too much @mama_bear13-16 @keepingupwithhenry
My 5 month old was taking 2 oz tell 2 months old then moved up to 3 but offered 1 oz since it's one scoop every 2 oz. he's 2 weeks shy of 6 months and on 6 oz. I moved him up once he started getting hungry every hour.