About a year ago, a kind lady gave me a li'l ol' mower, Briggs & Stratton engine. The handle was busted from fatigue, so it had done a bit of work. When I got it home, the first thing I did was check the oil. There wasn't any. Never had been any. After taking off the oil filler tube, I could see the bottom of the crankcase-spotlessly clean alloy. No trace of oil. I filled it up and put some petrol in it and it started first pull and ran nicely. A bit down on power, but it's still goes and cuts grass!
Peter.