Hi Family,

What diff oil are you running and why did you chose that viscosity?
In case of the LSD, does anybody have an experience with 75W-140?
I have LSD and not sure which way to go: 75W-110 or 75W-140. I know that recommended oil for e46 M3 and e38 M5 is 75W-140. MFactory recommended that to me as well. He is the message:
"Fluid viscosity should be thickened if any competitive driving is being done. We recommend any high quality synthetic 75w140. Our go-to fluid is Torco but we understand that it might be difficult for some customers to find in their region.
When in doubt, Motul is always a choice we recommend."

Diffsonline is recommending to stay with 75W-110.
I think 75W-140 will be an overkill and not ideal during the cold New England winters.
Thoughts?