Oil doesn't normally see 180* depending on the oil used, unless you are eating bearings up. I've never run an oil cooler on anything I have owned, even with filled block motors. Whether it be driving around for a half an hour or going down the track, never had any oil temperatures exceed 180*.
Most people here are running thick oils, too. If you run a synthetic, even more of a reason that you do not need the cooler.
It does depend on the weather conditions. If it's hot in the summer, it's an oil heater, if it's cold outside, the coolant actually sees a temperature below oil temperature and will cool the oil off. Either or, it's refutable and only there for insurance reasons.
Mine's coming off for those reasons.