I cant remember what I used, got it from Midas , was about R150 a bottle or less. Cant really remember.
Was happy with it, gave me a few extra KM per tank and in my mind at least, some quicker throttle response.
Will check out midas this wknd, BTW i got that Diff Oil from BMW, R345 for 500ml, we need 3 bottles, going to put it in tomorrow, hopefully all sounds go away