The canyon run temperatures above were absolute worst case scenario, driving the car very hard on a very steep and very tight road. I have included two more comparison graphs below. They are on a more typical canyon road, predominantly third gear. These runs however, also utilize everything the car has to give. A more casual canyon run will likely have different results.
These runs (east grade) were also done very soon after running the very demanding road above (south grade). You may notice that the oil temperatures on the WITH cooler logs are decreasing. This is the cooler doing its job and dropping the oil temperature which were elevated by the very aggressive road driven prior. In the logs above, you will notice approximately a 11 degree max difference in oil temperature. In the more conventional canyon road below, you will notice after the cooler stabilizes the oil temperature, a more significant 20 degree drop or more. I think this is more representative of what a typical canyon driver will see, if not more, since this road is still being driven quite aggressively.
More Typical Canyon Run without Cooler
More Typical Canyon Run WITH Cooler
I hope this helps, please let me know if you have any questions.