[wprater]

Comprehensive test, thanks for sharing.

I just did a 30 min drive and 5 mins of idling.

I confirmed that both the inlet and outlet lines from the thermostat were at ambient temperature (70°F) after startup and a few minutes of idling.

After 15 minutes of driving, the oil line temperature to the thermostat was at 145°F, and the oil was not flowing to the cooler.

After 30 minutes of driving, the oil temperature from the engine to the cooler is about 165°F, and it is flowing to the cooler. It was 93°F coming back to the tank from the cooler.

I'm not sure exactly when the thermostat is opening up, but I just replaced the guts of it, so it should be operating correctly.

The gauge is still sitting at the top of lower box at ~160 F.