I thought I would pass on some tech info
Power Up is a US based company that manufactures lubricants (Dom keep your thoughts to yourself), and I have been using their Thixo grease for a few years now in my Jeep
Here is the link,
http://www.powerupusa.net/info_thixogrease.htmThis stuff has been amazing, especially with offroad and resistance to water and mud. The store owner was telling about this stuff and he said it will blow the pants off any other synthetic grease out there. This stuff sells for $11.50 / tube and the only place I know that sells it is Bowness Auto.
So if you are looking for an excellent grease to use in your offroader, give this stuff a try, it has worked great for me.