I haven't mounted the temp gauge yet. I really think it's important to have an oil cooler on this car mostly because of the oil sprayers that shoot hot oil under the pistons, this is not a good thing for a car running 10.5:1 CR, if I'm going to get the ECU tune for the car, it will be adding more timing, to the fuel air charge, and IMO reducing heat soak to the pistons is a smart modification to do inconjuction with the ECU reflash.