It's not that much fun and, if you value your time, it's not cheaper. Factor in the time to buy the oil and the new filter. The time to clean up the funnel and

It's not that much fun and, if you value your time, it's not cheaper. Factor in the time to buy the oil and the new filter. The time to clean up the funnel and pan. The time to properly dispose of the waste oil. Consider the busted knuckles trying to open the drain. Consider the stripped drain plug. My neighborhood shop charges about $30. They use some kind of suction device that I think does a better job of getting the gunk out than gravity does anyway.