The Generac 6840 maintenance kit is designed for the 5500-8000 watt portable generators. If your generator has been running for extended periods or has been stored for several months, it's a good idea to change the oil and fill the tank with fresh gasoline. Be sure to review your owner's manual for the suggested maintenance schedule. What's Included: (1) Oil, (1) Air Filter, (1) Oil Filter, (1) Oil Funnel, (1) Spark Plug, (1) Fuel Stabilizer, Shop Towel and (1) Chamois Tune-up kit keeps your generator running at optimum performance Scheduled maintenance is a necessity to ensure the long life and top performance of your portable generator Genuine OEM generac parts