Hello, I have a 2006 STR. I want to change the differential oil. What brand and viscosity do I need and how much ?
Thank You

 

What does your owners manual say to use?
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Jaguar part number JLM20771 is the Final Drive Oil.

I have several 1 liter bottles but the part number is probably superseded.
75W90 is most likely the spec.
You can use 75W140 or whatever you like.

 

75W140 only in the Ford 8" diffs

WSS-M2C192-A

 

Can’t help with the specifics, but one general caution to heed:

Make sure you can loosen the fill plug before removing the drain plug. If not, you risk the possibility of draining the oil with no reasonable means to refill it. Your car is now immobile until you can extract the fill plug, which may require drilling, swearing, and the use of explosives.

I do not care to discuss how I learned this…

 

i don't believe the STR has a drain bung only a fill bung . you have to suck it out ,
i use a pneumatic vacuum brake bleeder .
its a ZF diff and uses full synthetic 75-140 .
under 2.5 liters

 

This should help:
https://www.jaguarforums.com/forum/s...s-type-264126/
This is as I did it on my 3.0L 2004 S-Type. And I explained in the link above as well, why I took 80W-140 instead o 75W-140, and CA is equally warm compared to Australia...