Quote:
Originally Posted by rallly
Hey guys! I've read through this thread and cannot make a clear decision.... I have a 2008 328Xi 6spd So which transmission fluid is best for ease of shifting for summer and winter and safe for both bearings and synchro's ??
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What is specified for your vehicle?
I ran Pentoson FFL-3, IIRC, because it crossed to he ZF spec that crossed to the BMW MTL spec for my 135. Ive been happy.
Lower viscosity lubricants will perform better in the cold but compromise high temperature performance to a point. Higher viscosity will be more difficult to shift in some conditions. Some fluids may have friction modifiers that affect synchronization.