Simple names would work in a small town. I'm located in Northern California. In Sacramento (population 525k) there's a new SS car wash named "The Wash". In the neighboring town of Roseville, CA (population 152k) there's an existing SS car washed called "A Car Wash". IMO if you're going to open a car wash in a large city, give it a memorable or unique identifying name. I'm located in Citrus Heights California (87k).
When I bought my old SS car wash in 2003, the building letters simply read "Car Wash". I remodeled it in 2006 and branded it in 2014 as "Citrus Heights Car Wash". My website is citrusheightscarwash.com. It's now the best, most modern and busiest SS car wash in a 20 mile radius!