Just a quick one, my diff is a little noisy round corners, I have just got the car and the previous owner is telling me
the diff oil is due for a change.
I have got 2 Ltrs of Castrol Syntrax Limited Slip 75W 140 and some Red line Limited Slip Friction Modifier.
i know that the BMW stuff is the best to use but I havent got any handy at the moment so, would the stuff ive mentioned
be okay? Or would I be doing the car misjustice?