With the air to oil cooler the oil temp will be 210 - 220 if you're pushing it at all. That is actually a good temp for oil. You don't want it to be too cold, either. Over 180 as a rule.
Without the oil cooler it will tend to fluctuate a bit more. Unless the car is hitting limp mode a lot (which shouldn't happen on the street) then I wouldn't worry about it too much. I mean, you don't want to run 5,000 miles at redline on oil that has been to 300 degrees every day but you don't need to worry about occasionally getting up to 250 - 260 degrees at all IMO.
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