I've done a search and came up empty. I've got a 2001 Dodge Ram 3500 supercab dually w/ a Cummins and 4X4. Now when this truck was new it got 19 mpg. Now I'm only getting 11.6 mpg. I've just put in a new k&n filter and a new fuel filter, with no change. I've also ran just about every kind of desiel injector cleaner through it that I could find. I don't know what else it could be. Any input is appreciated.
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2001 Cummins MPG. worse and worse
