As the BOA 90LS rear diff oil isn’t available from the local Silkolene branch office here in Greece, I try to find suitable diff oil for my car (MY2000 Euro spec).
Is the Castrol SAF-XJ 75W-140 right for the rear differential?
“Fully synthetic SAE 75W-140 hypoid gear oil formulated for use in both conventional and limited slip differentials. Whilst being suitable for all applications where a lubricant of this quality is specified it is specially formulated for use in limited slip differentials fitted to Japanese vehicles requiring an SAE 75W-140 Extreme Pressure Gear Oil. Castrol SAF-XJ is also specifically designed for BMW differentials including the Z3 limited slip differential.
SAE 75W/140, API GL5, BMW, ZF TE-ML 05”
If no, witch oil do you guys suggest me?
Thanks in advance.
JIM

 

Just to add in the above my Manual says 75,80 or 85-90 gearbox oil
for the diff.
JIM

 

Jim
As you live in a country with a high average temperature I guess a 75/140 is ok. In the uk I would reckon the 140 end may be a bit thick. 90 is the more usual viscosity. As the limited-slip is of the sealed viscous type, you don`t actually need a LS compatable oil. There was some debate about this a while back.
JohnD