Sounds fine to me! Some babies do feed 2.5 hourly for the first few months, they will gradually stretch as they are able to take more. Keep offering more in the bottle than you think he will take so that he can stop feeding because he is full and not just because the bottle is empty. There are a lot of growth spurts in these early months!
The other thing to think about if the frequent feedings don't settle is if he is in discomfort, many refluxers feeds small amounts frequently because it helps to sooth their throats, although that tends to be an oz or 2 then refusing to feed any more. Does he have any other symptoms like discomfort while feeding, wet burps, hiccups or not liking being laid down flat?
Laura