I have the stock
oil cooler on my SPF. If the temperature is below 60 degrees or so I run the cooler with a piece of plexi in front of it (you don't even see it) or the
oil will not get to 180. If the temperature is between 60 and 90 degrees I run it partially blocked with a piece of plexi. Above 90 I use the whole cooler. I try to keep the
oil at a minimum of 180 degrees.
Bob