The Series 850 Oil Changer can be used in multiple locations and on site. It has one button to start the system and one button to draw the oil sample. Turns off automatically when oil pan is empty. It needs only shop air and connection to waste oil container. The patented Drain Fittings insure a "Spill-Free" connection with the coupler and the patented magnetic insert captures ferrous particles, improving engine life. The Semi Automatic Oil sampler has a built in time delay assuring a non-contaminated sample for each oil change. Mechanic can choose how much oil is desired for a sample. Evacuate 40 quarts of oil in mere minutes. Saves an average of 20 minutes using the conventional gravity drain method.