Differential Oil Problem

[Dezautobm]

Hello.
I can't find the oil specified in my service book. The name of it is Castrol Differential BOT 720, and i need it for my rear diff. electronic unit.
The problem is that i cannot find it anywhere. What would be a replacement of it or where could i find it ?!

 

[Saru]

You didn't mention what Range Rover you have. Having rear differential electronic unit probably you have the new RR L322 or RR Sport. If these then you really are in need for part number LR019727. This is the newest Land Rover code for the electronic control rear diff unit oil.

 

[Dezautobm]

Thank you for this reply. I'll remind this for future.
By the way, mine is RR Sport. I found the oil from service book in my local rep. LR. It's not so cheap, but i'm used to it seince it's a LR mark :

 

[tlt]

RRS / LR3 specs

Here is some updated information, and as a reminder there is a difference between Initial oil fill, and an oil change. I use Royal Purple, I have pasted in the Oil I use at the end of this.

Open Unit:
Castrol SAF–XO
Initial fill:
1.23 liters / 2.59 US pints
Service fill:
1.18 liters / 2.49 US pints


Electronic Unit:
Castrol BOT 720
Initial fill:
1.77 liters / 3.74 US pints
Service fill:

1.72 liters / 3.63 US pints

Front Differential:

Castrol SAF–XO
Initial fill:
0.68 liters
1.44 US pints
Service fill:
0.61 liters
1.29 US pints

Transfer Box:

Shell TF0753
Initial fill:
1.50 liters
3.17 US pints
Service fill:
Fill to level plug

Transfer Case: Royal Purple Synchromax (part #01512, quart bottle) or Royal Purple Max ATF (part #01320, quart bottle); 1.6 quarts

Differentials: Royal Purple Max Gear 75W-90 (part #01300, quart bottle); 0.65 quart for the front and 1.6 quarts for the rear.

recommendations
Diff oil change interval - 25k miles
Tcase oil change interval - 75k miles
Transmission oil change interval - 60-75k miles