I don't have and answer for you.
5y ago, I was working with a few others who were following my efforts to put a new 420cc engine into a Chinese mini that was purchased without a motor. One guy,a building contractor in SoCal, really worked his machine hard on jobsites. Enough to change the color of the engine oil that day. So he changes the oil after every job. Last I heard, the machine is still running. I think he also removed the house cover in the back so the engine would not get so hot.
I think that if I monitored the engine temp, I would place the sensor in the oil sump.