I have a 2002 F-350 with a power stroke deisel engine. At about 30k miles oil began spewing from the radiator over flow. This is not good news , like time for a new engine i think. I think the engine is still under warrenty,but, I was wondering if the addition of a computer module could cause a major problem like this. I added a tremendous amount of HP and torque by reprogramming the computer but the company says its all safe . Now I wonder. Anyone have any experience with this? Mike