A scheduled maintenance program ensures the generator system is always in top operating condition and warranty requirements are being met. Generac's scheduled maintenance kits provide all the hardware necessary to perform complete routine maintenance on a Generac automatic standby generator. Oil must be purchased separately based upon manufacturer recommendations. Maintenance is recommended at every 200 hours or 2 years. 6483 MAINT KIT 11KW530CC KIT(FOR 2013>HSB MODELS)