Quote:
Originally Posted by chris719
I think the evidence is very strong it is. FFL-3 and FFL-4 are both listed directly in their own words as "first fill" for the PDK and DCT. This lines up with the ZF PDF floating around, so there's no reason to believe it's any different for the 6MT spec. I find PDFs going back all the way to the 1M and 2010 that say the same thing.
That said, they are all designed as lifetime fill fluids, and they are primarily designed as DCT fluids. So, I completely agree with you that we have no idea if they are ideal for the shifting feel of the 6MT.
For all we know, the worst fluid in the DCT could be the best for the manual if we are speaking only on shift quality.
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They are probably not exact fill. Only exact product would be one sold by ZF or BMW. Even if one transmission finds way in two different manufacturers, they might have different demands and require for formula to be unique to them.