Fionaw, I think 4 hours is perfectly fine and very normal. When I was formula fed as a bub that was the pattern that I followed. Our little man was the opposite in that sometimes he demanded a feed every 2.5 hours! Our paediatrician advised me to feed him what he wanted, when he wanted it. Eventually when we moved onto solids (at 4 months) he cut back to 4 hours.

I have just looked up what the average formula is for a 2 month old bub (thanks Robin Barker!). At eight to twelve weeks they should be having 5 to 7 bottles (of between 150 and 210ml) every 24 hours. The total volume per day can be worked out by multiplying your bubs' weight in kgs by 150ml. As long as he is within that range, in terms of his total formula consumption, it is all fine! How frequently he drinks is of lesser importance

Regarding the sleeping, we have never had a problem at night. For a long time he woke up for just one feed. He stopped waking for that bottle at night when we started him on solids at four months.