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      12-14-2011, 07:39 PM   #38
Thread killer

Drives: 1M
Join Date: Aug 2011
Location: CA

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Originally Posted by Dackelone View Post
I thought I might as well post this info here too, since this IS the sticky. PyratOne's awesome diff fluid thread...

1M limited slip differential information

Ok guys... today I went to my BMW Zentrum and asked about the diff fluids for the 1M. Here is what I found out. The factory fill oil for the diff is Castrol SAF-XJ. NOT the +FM, just the regular SAF-XJ oil. This oil should be changed at the first service 2,000 kms or 1,200 miles on M cars. This oil is spec'd for the M3 e90, e92, e93 and 1er M Coupe, aka e82 M Coupe, aka 1M.

You need three 500ml bottles to change the diff oil out. The diff holds 1.2L

Castrol SAF-XJ BMW part number: 83222282583 for one 500ml bottle. cost is 24 euros per bottle at my BMW Zentrum.

I also asked about the Castrol SAF-XJ+FM diff oil. My dealer had never heard of this +FM stuff... but it is a good part number. The price of +FM is 30 euros per 500ml bottle. But it is interesting that BMW AG does not say to use it. At least not in their latest service info to the dealers over here.
I'm (still) a little confused. Isn't the part # referenced above (83222282583) correspond to the (+) FM diff fluid?