All of them in my area are locally owned except for the one at the Mills Fleet Farm. I think they had a Super Wash here in Mason City when I moved here, but they sold out.
In Omaha, they had a number of Super Washes and they also had Russell Speeders. And every gas station has one. That was a fact that drove me nuts when I moved here, because none of the gas stations have a car wash here except for the previously mentioned Mills Fleet Farm.