Did you know if you take a no oil needed in for maint. the repairman oils it , usually with special oil? It does need oil just doesn't have the oil holes. You have to take off the housing. The gears are embedded with silicone and that is why no oil is needed for the gears. The silicone will eventually dry up. If you have a high dollar no oil machine better get it serviced at least once every year if it has heavy use.