Originally Posted by AgX
With plastic gears silicone grease weould be an alternative.
Though I try to avoid a silicone oils and greases, due to spread, surfaces unwillingly becoming slippery and the difficulty (compared to Petroleum based lubricants) to remove it.
+100 on the silicone lubes. I don't use them unless neccesary - meaning specified.
Plastic gears are usually pretty quiet, though.