It’s more important to protect your engine against extreme heat rather than having it run just a few degrees cooler. There’s little advantage in keeping your engine oil at 100°C rather than 115°C. Both are well within your engines operating range and the oil’s lubrication range.
But there is an advantage in preventing it getting as hot as 130°C. That’s not good – even for short periods. See notes on cooler engine oil.
Cool My Hog engine cooling fans for Harleys are designed to fight extreme temperatures – to take the edge off extra high temperatures.