Dry? They do not require lubrication except when intalled. The reason they clunk is that the metal center of the bushing has separated from the rubber that is secured to the metal center and outer metal of the bushing. For instance, if you gripped an apple around the outside so it was held together but the core was separarated, the core or center of a bushing, and then hit a bump or turned the core would travel more and 'clunk' when it hit the outer part of the apple.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas