So what did you do to your Disco today?
#3992
I run Schaeffer 5w40 full synthetic in my 1996 Discovery. Currently at 225,000 miles on the original engine.
#3993
#3996
Rover's North appears to have them here:
NUT M16 SPARE WHEEL REAR MOUNT, MXC7887 - Rovers North - Classic Land Rover Parts
There is also a clear plastic washer behind the nut. The following claims to be for the Defender, but it looks like the same washer I have on my D1.
WASHER SPARE WHEEL DEFENDER & DISCOVERY, MXC7335 - Rovers North - Classic Land Rover Parts
<EDIT>
Actually the URL also says Discovery, so I think you're good to go with this!
#3997
#3998
You are very lucky! Mine went missing from my garage... So mad the day that happened. And my fabric cover fell off in a car wash.
#4000