Originally Posted by DaveW
I use this....

https://www.morrislubricants.co.uk/products/auto/gear-transmission-oils/lodexol-xfs-80w-140.html

It has LSD friction modifier already added, although sometimes a bit more is needed if you can hear the chatter.




Ditto my diff on the S1 & the 3.7 were / are fine. Allon White also filled the S1 diff with this oil


JohnV6
2022 CX Plus Four
2025 MG ZS EV aka Trigger