Shoot, I just finally changed the oil in my HOnda 215 walk behind...I bought it 7-8 years ago, don't recall that I ever changed it previously...runs like a champ, doesn't mow worth a hoot though, never has...leaves stray blades of grass standing up, no rhyme or reason to it. The old cheapie mower I bought 13 years ago at HQ (remember them?) cut better but was an MTD product, and poorly engineered. Then somebody stole the old cheapie.