I just had a question regarding adding a chip to my 2002 F150. It has a 5.4L. I am looking at two different chips. I am looking at the chip built by diablo and the Switch built by Kenne Bell. They both seem like quality products. I was also wondering if adding a chip will reduce my gas milage any. If anybody has used these products or knows anything about them let me know. Any info would be great. Thanks