8 ounces for a 2 month old

My son is 2 months old (10 weeks) & is drinking 8 ounces every 2.5 hours unless he's sleeping. He's been doing this for almost 3 weeks. When he was at his 2 month needles, I mentioned it to the pediatrician and she said it was likely a growth spurt and if he's hungry, feed him. It's been 3 weeks and I am concerned. He eats the amount of a 6 month old. He is in the 90 percentile for his height and 35 percentile for weight. Any suggestions? Does this sound okay?