The reason your MPG sucks is because you have the Edge programmer.
Your calling B.S. on what? No one ever said anything about the 6.0 being the best motor or made any comparison between a 6.0 and a 7.3. 6.0 Just happens to be what we own. Great thats what you are getting on the hwy. You failed to mention what tire size you are running, gear package or anything else. Not to mention the 7.3 is a complete different breed of ford motor like you pointed out. So your calling B.S. on what? :banghead:
Leaves a cookie, and voids any and all warranty if they so desire, most shops will be cool about it, I guess it depends on what broke...Some people get away with it, others don't. I am the kind that they would call me on it and void my warranty, so my Dmax is bone stock.
GT