I am totally off Redline for my cars.
One of the top E36 M3 autocrossers dropped his diff temp by 20 degrees switching to Mobil 1 from Redline. And having had Redline in my cars, it comes out looking very nasty.
I run BMW LTF2 in the tranny and Mobil 1 in the diff on the Roadster and LTW. Castrol fluid from teh dealer inthe E46 diff.
'95 Alpine M3 LTW
'00 Dakar M Roadster
'02 Topaz M3
Red/White SRF #4 (Chassis 561)