Questions for Bill about upgrading to

[jerseymike47]

Hey Bill, I have a Gryphon Evolution and am thinking of upgrading to a CS or CTS programmer. This is for my 2000 F150 5.4. The Evo has been good though I have been having problems with it lately. Also on the canned tunes it came with I cant be sure that I noticed any performance or fuel mileage difference, but I may be wrong.
Anyhow I would like to know if you write a fuel sipper program, my goal is 20 mpg though with 3.73 gears I am not sure if that is possible. I would like to get the best out of my truck. I have added electric fans, and 3 in cat back exhaust. I would like a little more power out of it and a mile or two better per gallon. Let me know what you think and what my options are. Thanks, Mike