Quote:
Originally Posted by dEvo6
Are you sure it's OK for our differential ? I remember that Castrol SAF-XJ it was the sole diff oil that eliminate the noise in my previous cars (M3 both), and Castrol told me that was due to the so called FM booster 
I have to change it soon and already have 1.5 liters SAF-XJ I can't use (because it's the non FM booster) |
Yes, the 1M comes factory filled with SAF-XJ (
without the
+FM friction modifier).
As far as I know... only in the USA/North American market does BMW spec the
SAF-XJ +FM (plus Friction Modifier)... to prevent customer complaints about a noisy diff operation(sound).
IF you have your 1M or M3 serviced in Germany... they will just use the
regular Castrol SAF-XJ without the friction modifier package.
So as long as your car's (diff) has never had the
SAF-XJ+FM... you can use the regular
SAF-XJ diff oil.
Dack