The Generac 6840 maintenance kit is designed for use with the 5500W to 8000W portable generators. Scheduled maintenance is a necessity to ensure the long life & top performance of your portable generator. 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 & fill the tank with fresh gasoline. Be sure to review your Owner's Manual for the suggested maintenance schedule. This maintenance kit includes: (1) Shop towel, (1) Paper oil funnel, (1) Quart of SAE-30 Oil, (1) Air filter and (1) Spark plug.