On flights yesterday I noticed the oil temp reading on my AFS-4500 jumping
around in a 20 degree range. I have not noticed this on previous flights and
typically see much more stable readings.

The following graph shows the oil temp over the complete 80 minute flight with
1 second sampling.




This graph zooms in on a randomly selected 1 minute segment of the flight.



Any ideas what could be causing this? I've ruled-out a loose connection at the sensor.
Thanks,
- Dan