Hi Guys,
I sent an inquire to the folks at Derale Products regarding an Oil Cooler for the Zetec and below is the response they provided I thought you all will find it informative.

Volney,
Adding an engine oil cooler would definitely increase the reliability of your Contour. Especially if you add power producing parts. Our heavy duty cooler kit includes the temperature controlled sandwich adapter, cooler core, hose and all hardware. The part number is 15502. This kit will bolt up to your contour. The great thing about our sandwich adapter is the thermostatic control, oil bypasses the cooler when it is below 180 degrees.

You can buy this kit from carparts.com, 877-38-parts or Summit Racing 800-230-3030, Summit is offering free shipping right now.

Thanks for your interest in Derale products.

Mike Longo
Customer Service
mlongo@derale.com