From Longman Dictionary of Contemporary Englishcar washˈcar wash noun [countable] TTCa place where there is special equipment for washing cars
Examples from the Corpus
car wash• Quintana, who works at a car wash, said she bore her first child at age 13.• Larry ran a car wash and Pam was the car wash cashier.• Isn't there a car wash near?• A distributor ordered five gallons of car wash that was not shipped on schedule. 