waking newborn to eat

My son will be 4 weeks in couple days- I nicknamed him man cub and bear cause eats like he is going into hibernation during day! With my first it was like clockwork she ate every 3 hours-with my son it started like that. During day he is typically eating every 3-4 hours eating 5oz., if we are out in fresh air or in car he goes 4 hours. By dinner time he can be couple feedings 2-2.5 hours apart and more of cluster feeding. He is EBF. For the last week he goes 5 hours at night before next feedings-should I be waking him? His fontanal isn't depressed like dehydrated and cluster feeds before bed and he eats great all day.