Hey guys, I have a 2000 F250 PSD that just hit 90,000. Its got a 5in exhaust and a k&n. Bone stock besides that. Im getting like 14 MPG right now, and I drive it a lot. Just curious on what chip/programmer will give me the best MPG gain. Not looking for any power increase really, dont wanna toast the trans or hurt anything. This is my daily driver, so it dosent need to be fast. I have my car for that. So any reccomendations? and whats the "real world" #'s......not the advertised ones? Thanks guys.