
Uly, if the person speaking lives in a town or a city where cars are usually washed at the stations, he/she would say: «Я сейчас на мойке» or «Я сейчас мою машину». Both phrases imply that the owner of the car is at the car wash station, not washing it himself/herself. And if he lives in a small town, he would wash it himself in most cases.