Assuming you are asking if a shop vac is good for cleaning a car, the answer is yes. A shop vac can be used to vacuum up dirt, dust, and debris from the interior and exterior of a car. When using a shop vac on the interior of a car, be sure to use the appropriate attachment so as not to damage the upholstery. On the exterior, a shop vac can be used to clean wheels and tires, as well as other hard-to-reach areas.