ok, now I know I might catch some slack but, I need to ask this. I have an 04 6.0 . before I had any problems with my truck I would get between 15- 17 mpg back and forth to work. about 10 miles...Truck started to run a bit crappy. mechanic said bad egr, bad oil cooler , bad turbo. ok so I replaced all. now my issue is after a little bit of a ride can get mpgs to 15. when I stop at a light or sit at idle my mpgs drop!!! a lot down to 9 mpgs. I need to find out why my mileage is not what it was before. oh and it has a brand new sct street tune. all numbers r from my edge cts. thanks for the help
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