Designing an Engine Oil Temperature Display Gauge Project

[bioman_imp]

Sorry for late reply on this subject as I did not subscribe to this thread.
Saw it only today (Nov 4th 2019).
As previously mentioned, on purpose, the thermistor does not contact the fluid due to the rotating clutch basket and the fluid level is much lower (as per sight glass).
I guess DOREMI does not want to take a chance of getting the tip too close to the rotating components.
I would not suggest to put anything/thermistor through that filler cap as there are too many rotating parts behind the clutch cover.
Attached is the thermometer picture taken when I was stuck in mild downtown traffic -This time the needle did not get into the RED zone.
It is only reading the ambient air inside the clutch cover above the fluid.
My best guess; there is around a 15 degrees difference in the gauge needle.

Next year, as a pet project, I will calibrate the DOREMI temp sensor against the EOT (Engine Oil Temperature/voltage) and will keep all posted.

That sounds great! I am very interested in the outcome.