Lubrication of the chain is vital and will prolong your gearing systems life expectancy. Be sure not to over lubricate as this will attract grit and dust. Apply a small amount of oil to moving parts and use a rag to dry off excess oil. You can tell a chain needs lube when you hear squeaking and the chain links have a shiny metal look going on. Please note that for the Belt Drive models the chain does not need oil, it was built with zero-maintenance technology.