not getting good milage
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#2
we need a little more info on the truck, what size tires, any mods or tuners, what type of driving town/town & highway mix/ or all highway. how many gallons of fuel? stock tank and complete miles driven before refuel.
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#10
All what he said plus driving habits. If you're beating everyone off the line at each stoplight, you can garranty 10-12 mpg's all the time. Winter fuel maybe playing a part in this too. I always get less mpg's in winter with the seasonal fuel. Do you also fill the tank every time? I don't because Ex's have 42 gallons (useable) tanks and that is just a LOT of extra weight sloshing around for no reason. Can you try driving with 1/2 tanks? Do you use any additives?