I don't know a great deal in regards to the Liquid Moly range, I'm sure someone here will be able to help. But just be careful in regards to the oil you use for your gearbox, it need's to be yellow metal safe, GL4. Some GL4/5 fluids are buffered to prevent yellow metal discolouration, but please check. Landrover specify BOT130M, only available from dealers and it's hard to get.
I use Motul Gear 300 75w-90 fully synthetic, for the gearbox, it's GL4/5, but yellow metal safe. Gearbox service fill is 2.2 ltrs, do not overfill.
Transfer Case, Castrol Syntrax, fully synthetic 75w-90, service fill 2.3 ltrs. I used to put the Castrol in the gearbox as well, but changed to the Motul last service.
Engine, I now use Total Quartz 9000 Future NFC 5W-30, meets Ford WSS-M2C-913-C specs, backwards compatible with WSS-M2C-913-B. When previous owner had it serviced by the dealer, looks like they used Castrol Edge Professional 5W-30 and earlier on Castrol Magnatec A1 5w-30
Diffs, Castrol EPX 80W-90.
These are just the oils I use, there are many more options, try Defender2.net, the UK forum, the boys and girls there are just as helpful as the guys on this forum.
I service mine every 10,000k's, engine, air and fuel filter. Gearbox and Transfer Case every 20,000k's, I don't know how Landrover can say the gearbox should be done at 200,000k's, that's just madness

. Diffs get done every 10,000k's.
Mine is a 2010 Puma, when i bought it it had a full service history with just over 60,000k's on the clock. The gearbox oil was dark black and had lost most of it's viscosity, plus it was overfilled as I got 3.4 ltrs out of it, maybe I got one of those Friday afternoon assembled Defenders, as the initial fill from factory is 2.4ltrs.
Enjoy servicing your Defender, the Puma is very easy to do, just check the quality of the oils you use, have fun.
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