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 every 200 hours or 2 years. What's Included: (1) Air Filter, (1) Oil Filter, (2) Spark Plugs, (1) Oil Funnel, (1) Chamois, (1) Instruction Manual Designed for the 20kW and 22kW air cooled models from 2013 or later (999cc engine) Keeps your generator running at optimum performance Oil not included