I never oiled the chain on any of my bicycles, and it's been more than 25 years. They still run. Even so, I prefer putting on a little grease on such a sprocket

I never oiled the chain on any of my bicycles, and it's been more than 25 years. They still run. Even so, I prefer putting on a little grease on such a sprocket compared to hoping that my solar panels will generate enough power after 13 years. And in my initial post, I unequivocally stated that one of the biggest problems with the integrated Stirling engine is that no residential kits are available at the local hardware store.