Hey guys just got my F-5 chip reburned from DP-tuner for my new 1997 f250 e40d. 217,000 miles 4x4. I have a 3" downpipe, 6637 and guages.
0. antitheft (very handy)
The tuning is freaken awesome. The throttle is very smooth and linear( not touchy) but peppy. Overall a lot more power than the previous tuning that i had from superchips(yuck). And the shifting is perfect. Firm and quick but not harsh. I have driven a few 7.3's with tuning from php,tdp, and swamps. Dp's tuning is right on par and better in some aspects. Plus the hardware is awesome.
I'm afraid i cant provide any information regarding fuel mileage as i am having way too much fun with it right now.