I'm attempting to change the oil in my Toro model 20438 lawn mower for the first time and would like any and all advice available. Thanks!
Run the engine a couple minutes before beginning to warm the oil so it flows better. Do you have the instruction manual? If not, go onto https://homeownersolutions.toro.com/ and get it -- oil change directions are on page 13. It often helps to have somebody hold the oil drain pan when the oil first starts to drain.