I completely disagree. I would only fit an oil coiler if the oil was REGULARLY exceeding 115-120°C. On the Cosworth rally cars, they aim for oil temps of around 110°C, as this burns off any impurities (such as water from condensation) that get in the oil (which can reduce the protective properties).

I forgot to mention, I too have removed the water cooling from my T4 to give the coolant system an easier time....