I believe Pfadt supplies marine grease w their poly bushings. Lots o'chatter over on the vette forums about zerk fittings. Apparently zerk will get the outer diameter, but the real lubrication needs to be in the center to avoid binding (on a C6 arm, anyway). The only way to do that is to remove the arm and grease it up. This was the reason Pfadt modified their design to a two piece bushing.
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