Oscars will take large food so it depends on what you’re feeding.Thanks so much! How much is the right amount to feed a young oscar? It's so hard to tell! Right now I'm on a 30-50% water change per week schedule depending on nitrates.
Young fish need to eat more often then adults.
I would feed twice a day, smaller feedings more often, then as the fish ages you can cut that to one feeding a day.
Once they are adult size you can feed less like every other day.
I know some keepers, once the fish is an adult only feed a couple times a week.