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So this is an old threat but this information i have not come across and i add it here:
For cold climates -5 and less.
I did manual transmission oil change and put inside:
Febi Bisten equivalent transmission oil for OEM code: 83222339221 (because it's available everywhere in my area).
Which was: FEBI BILSTEIN 40580
In short when transmission is still cold shifts were worse than the original old oil - not smooth at all.
I then purchased 2L of original BMW 83222339221 oil and put into transmission and in cold temperature it is very smooth.
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