a method and sampling system are provided for sampling and marketing fluid replacement services . once an automobile arrives at the service facility , the automobile service technician quickly obtains fluid samples from the various systems of an automobile . while the consumer provides relevant information relating to the vehicle to a customer service technician , the automobile service technician places the fluid samples into receptacles allowing the consumer to visually inspect the condition of each fluid . the service technician then provides new fluids in proximity to the actual fluids of the engine to allow a side - by - side comparison of the visual condition of the fluids . the samples are then presented to the consumer while the consumer is in contact with the customer service technician to allow the consumer to make a determination as to whether the fluids must be replaced .