Diff Oil choice.......??

[Zed08]

Hi all,
Hoping to get some advice, am looking to change the diff oil over the holiday period, was wondering what to use, assume 75w140. Loads of brands but I see Opie suggest Motul Gear Competition fully synthetic racing transmission & ls diff oil.

Would Castrol Syntrax LL/long life sae 75w140 synthetic gear oil be sufficient (only mention this as it's on offer thru an auction site) Just wondering what people suggest....

Thanks

 

[MarkLG1973]

After some research I ended up ordering this for my 2.8:

Castrol TRANSMAX Limited Slip LL 75W-140 75W140 Fully Synth Gear Oil

Not got round to changing it yet…

 

[bombur]

I used this Motul Gear 300 75w-90 Fully Synthetic Racing Transmission & Differential Oil

 

[Zed08]

Ok, thanks for those pointers. Am i right the Z3M should be 75w140 or will 75w090 suffice. Maybe 140 used for trackday driving only??.
Thanks

 

[Nodzed]

See post #6 from @NZ00Z3
All you need to know about oils for Z3 diffs.

Transmission and Differential oils

Ok I'm totally confused now about what oil I use to change out on the manual transmission and the differential gear box . I have a 1996 Z3 1.9L roadster without limited slip . I did get under the car and saw the label on the transmission box that said "ATF" ./ The more I read about what oil to...

zroadster.org