Fluctuating temperature gauge
So we know that the temp gauge will rise to just over 90 then drops as the thermostat opens and colder coolant hits the sensor.
On mine this fluctuation happens two times in a row since some time ago. I speculate that the colder coolant is causing the thermostat to close again and when it gets up to temperature, to open again causing a second drop.
Anyone has the same thing occur? Just a note that the engine warms up fairly quickly and temperature is right after that so doesn't seem like a faulty thermostat.