Superabsorbent polymers and one or more solid and/or liquid lubricants, with and without lubricant additives, were formulated into a variety of solid and variable-viscosity lubricant compositions. A series of laboratory trials showed that superabsorbent polymer-based solid (e.g., agglomerated) lubricant compositions and variable-viscosity greases were more effective in reducing friction between moving surfaces than non-superabsorbent polymer-based lubricants.

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