[PeteC.]

Hi all i am new to here, I just got my 2013 X6 M last year, has 30k mile on the odo right now. Its running quite fine actually, haven't notice any problem so far. I bought from a local BMW dealership certified preowned. One problem i dont know if they have already done the injector index 12 or not. So far i dont notice any noise coming out from the engine.

I do my engine oil and filter change every 3k mile, was also thinking about changing my transmission oil and filter.

Can I ask how often do you guys change your transmission oil and filter?