Bit of a bugger when you go to bmw for a part number for the mineral atf,, and the don’t know ,, then you go to an independent motor factors , and with car details inc chassis no. Data system comes back with chf11 ,, Ok you can use this ,, so novice would probably mix the two ,, not good ! But are so called specialists Indi’s mixing the red semi synthetic atf with the red mineral atf,, could this be why the steering rach gets trashed , mabe you can mix the reds anybody???,, just a rant chaps all very confusing this atf