In the 26 years I have been operating my different tractors. I have had some things happen that could have been real bad to my tractor. I stopped to take a leak, and noticed oil leaking from the filter on my T020, the motor still had enough oil to keep from ruining it. Another time on a different tractor Mowing along and I see a streak of oil on the ground. I guess I forgot to tighten the drain plug. Caught it just in time. My more recent screw up. I added 5 gal of gasoline to my JD 401. All that cost was a injunction pump rebuild. That was a few years ago. I'm sure I am not the only one with close calls, of possible engine failures. Stan