Quote:
Originally Posted by rborane
oem BMW 75w140 without the friction modifier and change every 35k-40k. Oils with friction modifier are not necessary and from what I remember BMW used to use FM and stopped.
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Is this what you do for both Diff and 6MT?
From what I see ECS offers the service kit (BMW SAF-XJ+FM) with the Friction Modifier, and Turner Performance offers the service kit (BMW SAF-XJ) without the added FM.