Drain and fill suggested at 60 to 100k. pretty easy if you have the knowledge. have to measure and know here the fill plug, drin plus and the side plug to tell if filled to the right amount.

For a drain and fill it is under a gallon. Calls for KIA SP-IV also known as KIA Type-4 M. An alternative is Valvoline MaxLife DEX IV/Merc

There is a plastic plug on side to gauge the fill level if car is level
Top is plastic and the fill , side is the fill level check and under is drain plug.