I look at my oil temps all the time in my VW Sportwagen and finally plotted them up to see what is showed. These data were collected on the same route (and after enough time that they stabilized) - a 45 mile highway drive so speed and driving style are consistent with ambient being the primary variable. It should also be noted that oil type would also be a variable but all were 5W40s with the VW502 00 approval; I have seen no variation w/r to oil brand or when I change my oil etc. Extrapolation with red dashed lines on either side. This pretty much nails it in terms of low 200s in winter and low-to-mid 220s in summer on my drive. The graph would shift down for around-town driving where speeds/RPM are lower and shift up for aggressive driving - I have seen 235 on the track with sustained triple-digit driving. I see posts from time to time here about oil temps and over in the VW world/FB pages/forums I see comments about XYZ oil dropped my temps 10 degrees etc. but I call BS on those posts - oil temp variation being reported is most likely due to simply not controlling the variables for the data point collection or understanding that the oil temps will fluctuate with RPM/speed.