I have been watching this design for some time and jumped on the chance to try this one. I have discovered how easy it is to change the oil in my mower from the top, without having to jack it up and get to the drain plug (and get oil all over my hands). I just feed the included tubing down into the fill/check hole and this extractor pump pulls the oil out for me. I make sure to feed the tubing down to the lowest point in the engine, so I leave almost no used oil when the extractor is done. two ways to create the suction - with my high-pressure air pump OR by simply pumping the plunger a few times. For my mower, it takes only about ten pumps to create enough suction power to remove the 1.5 quarts of used oil from the engine. Once the oil is removed, I spin on a new filter and pour in fresh oil and I ready to go for another 25 hours. This extractor has made oil changes fast and easy. I highly recommend this unit for the DIY in your family. It will make a very welcome Christmas present. Thank you, VEVOR, for allowing me to sample and review this fantastic product.