Lower is correct that these Mugen cooling mods do really need the Mugen ECU, but if they are cheaper than the Honda parts it's a no brainer IMO.

The oil will still reach it's normal operating temperature whether you fit these two items or not. They won't have any impact on your oil reaching operating temperature.

You'd need an aftermarket oil cooler to really drop the temperature of the oil, and that's only relaly an issue if your running a Forced Induction (turbo or supercharger) setup

 

i would use the standard honda unit, also replace rad cap if its overheated, one other thing, does anyone know if honda antifreeze is distilled water antifreeze, if it;s not use it, its great