cool engine oil

It depends how you hook it up. If you use a sandwich adapter it'll be a low pressure circuit, like 2lbs. I have a couple of those running on different vehicles. The Hayden thermostatically-controlled ones are nice for that. I'm presently running a straight up filter re-locator with a cooler circuit on the Duster at full pressure. It's a benefit for the added sump capacity, whether you actually need the cooling or not. Cooling is a benefit too If it's a hard-working race engine.