I changed mine at 1200 miles and will do it again at 30k if I have the car still.
The factory fluid by Pentosin, buy 2 of them, takes about 1.6 liters:
https://www.fcpeuro.com/products/bmw...ntosin-1052107
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2020 M2 CS AW 6-spd
Previous M Cars: M2C, M2, F80 M3, E46 M3, Z3M Coupe, E36 M3...and some other fun rides.