Upping up the oz in formula.

So she takes 4oz or formula at 6 weeks on demand. It’s roughly anywhere from every 2-4 hours. 5/6 depending IF I’m lucky lucky lucky.

Should I up it to 5oz ONLY at the last late night feeding and see if she sleeps better? She will wake up at 3/4am hungry, but she has slept through 4/6 hours. Any advice ?