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Message: [QUOTE="95cobby, post: 1511860, member: 22530"] My father has a 2011 6.7 and recently drove it from Ohio to Texas to visit. He was concerned that his fuel mileage was 2-3mpg from where it would normally be and that the truck was going into regen more often. Truck has around 120k miles on it and is all stock. I'm not sure what would all of a sudden cause a drop in mileage like that. Once he got here I changed out his fuel filters.. they seemed fine and it didn't make any difference on his drive back to Ohio. Truck had the egr cooler replaced last year I believe and a few egt sensors. Would something like the deepeeF be causing this? I'll be driving up there in June so any suggestions you may have would be helpful. I obviously already told him to remove all the junk on it. I was thinking of doing a forced regen and resetting it.. not sure if I can do that with ForScan yet. [/QUOTE]

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