It removes oil and sludge through the dip stick tube making engine oil changes quick and easy without getting under the engine. The oil changer is supplied with both a 1/4" X 40" dipstick probe and a female garden hose connector to attach the suction hose directly to dipstick tubes supplied with male garden hose threads. The reversible pump allows the container to be emptied neatly and easily by reversing the flow direction and pumping the container dry. A retractable pouring spout is also provided if it is not desirable to use the pump for emptying. It is available in 12Vdc and has an 8’ cord with alligator clips.