An improved service station car wash system. A car wash kiosk is coupled to the fuel dispenser communication loop in the forecourt of the service station so that the car wash kiosk appears to the service station controller just as a fuel dispenser would. The car wash kiosk sends a car wash request over the fuel dispenser communication loop to the service station site controller. The service station controller handles any payment processing needed, as it would for payment entered at a fuel dispenser, and in turn communicates such request to a car wash controller for initiation of a car wash. The service station site controller is able to communicate to the car wash kiosk in a similar manner as communication occurs with a fuel dispenser, thereby making the functionality present in the service station controller for fuel dispenser applicable and reusable for a car wash kiosk.