73 Cadillac Oil filling from lower to upper mark

Moin dear forum, filled up motor oil yesterday for the first time at my caddy. The stand at the track bar was at “min”… Can anyone tell me how much I need to add to the brand at “max”? Filled in 0.5 liters, but the brand hasn’t changed much. I hate to overfill it… Thank you & beautiful sunny Friday! TorBenz