OP, I get it, I had a hungry baby too and I fed him so often that it was a lot more than the standard formula tin suggested amounts. My mum used to murmur that he was being fed too much and should be on a four hour routine. He was bigger than all the other babies at baby class. Everyone (in my life, not here) made me feel shit for feeding him so often but honestly he was that hungry and any attempts to distract were a short lived disaster.
In short, you know your baby best. Feed him when he's hungry, maybe even look at his cues so you can head it off before he gets upset.
My HV was helpful. She said if he's draining the bottle, up the feed by 1oz. If he's taking too much milk he will be sick, so it he isn't then he needs it. Feed on demand and don't worry basically. Your baby will grow and become leaner when they become mobile.
I personally took hot weather as 30+ degrees and only offered him a small amount of water a few times that day, the rest formula made up to the proper strength.
Something that took me an age to figure out is that wind also looks like hunger sometimes in small babies.
He often doesn't go four hours between feeds a year later but hasn't piled on weight, as she said he was become lean as he's got mobile. He also doesn't have vastly bigger feeds now than he did then, I was worried they'd just get bigger and bigger.