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      12-15-2023, 01:51 PM   #8
belcom
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Drives: '18 540i, '06 Z4si, '07 Z4MC
Join Date: Nov 2014
Location: Toronto

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Quote:
Originally Posted by wdb View Post
Yep, and that's what my car had in it from the PO. It didn't shift well cold and the infamous 3-2 downshift was nasty. I went with Royal Purple and both improved.
I got purple in the transmission as well. Seems it works well for me too. But what do you think about Red Line 75w140 gear oil for the M diff? Got purple in there now but its been a while and will be changing diff fluid in spring time. Already have Red Line on the shelf for that based on a recommendation from a buddy.
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