Back in 1946 to be exact.
Here is an article detailing the importance of Detroit in the history of the car wash business:
http://www.detroitnews.com/article/2.../BIZ/302170020
The article does mess up the location of the first commercial car wash though, due to the early '20s change in Detroit's addressing system. The actual location was on Woodward just north of Palmer [[not Woodward and Gratiot, which would be in the heart of downtown).
Bookmarks