I don't know why I was putting this off for so long. It was so easy to do. Picked up some sae 30 weighter, tipped the lawnmower over poured out the oil,then added the new. (yes the book recommends just tipping it over to change) I am use to an oil plug. But it did work and made it easy. Ran a little to long on the old oil, it was pretty black lol.