It is different for every baby and every pair of breasts. How many feeds is it per 24hrs? It may be that he just needs it because he isn't waking at night. Also is it 1.5 hrs between the start of each feed or between the end of one and the start of another?
I have a gap without feeding for 1.5 hours . It works out about 9 feeds a day, i have the bf app on my phone
which i suppose doesnt sound that bad at all xxx
We had about 8-9 feeds per 24hrs at that age but it was round the clock, so more spread out but no big stretch at night. So I'm quite jealous of the sleep part! It took my LO about an hour to feed at that time so 3hrly feeds had only 2hr gaps between them.
If he has always had this pattern it sounds like it is what works for him. If it is a new thing maybe look at if he is getting distracted during feeds and not finishing them (does he feed 5minutes, look up, go back on for 2, look round again etc.).