Ok Well I am in the millitary so money to spend on my truck is limited. but I am trying to make it better. I already have a 4" exaust. my next thing is an egr delet by the way my truck is acting and seeing how dirty the egr valve gets i figured its the best thing to do next. now I have an 06 f250 6.0L. and i am told once i delet the egr it will throw a code so i need to tune it. I do not have the money to get a tunner right now. my question is I have a freind with a bully dog flash tunner. is it ok to get him to flash a tune in the truck just untill i can get my own tunner? and if he puts the preformance tune on my truck but i keep my foot out of the pedal can i still get good milage? thanks for takeing the time to read this i know its long.