Since I started this thread I will chime back in and say that I just wanted people to know this was available as an option. I know that some people have been using the Land Rover branded oils. I personally use Mobil 1 as any Gl5 oil should be fine. Sierra BMW has been offering Lucas as a lower cost alternative. FWIW, I do not care for Lucas oils but I bet it would work fine. The only advantage I can see in using BMW branded lubricants is to assure that you make the warranty gods happy .