Generac A0002074708 Maintenance Kit with Proprietary 5W-20 Synthetic Oil for 14 – 17kW Air-Cooled Generators

Well worth it and includes everything.

I was quoted close to $300 to have a technician come to the house to perform a service on my generator. With this kit, I saved a boatload of money. I knocked out the service in about half an hour. The kit even includes a funnel and a rag to clean up.