Originally Posted by rldzhao
^again, the SAF-XJ fluid is the DEFAULT BMW APPROVED fluid for M3's differential (see attached).
EVERYBODY KNOWS THAT ALREADY
. My pont is if your car makes noise with that fluid, why use it again??? And that oil is A LOT cheaper than the +FM Montreal Red bought, which is the only OEM fluid guaranteed not to chatter.
I rather buy RP or Redline's diff fluid than what I have now, even if free. It's pretty obvious to me that SAF-XJ does not have enough friction modifier, but you're welcome to disagree. I won't use it again. Take care.