This is what boggles my mind about my truck. My '01 Jeep with a bunch of body armor, 37" mud terrains, the aero of a billboard, and an underpowered 4.0L will deliver about 12-12.5 mpg at 70-75 mph. Since it runs on 87 octane it's actually cheaper to road trip in it than my brand new truck since I'm now running 89 octane in it. I came to this depressing realization on the highway coming home this weekend. My antiquated '96 Bronco with a 351 which was lifted 4-5 inches and ran 35" mud terrains would deliver similar numbers to my new truck. I know the new truck is heavier, but sheesh....
How is it the older trucks that are similarly equipped get better mileage than ours? Ours are supposedly lighter and supposedly have better aero. I didn't sign up for great mileage with this truck, but I didn't sign up for abysmal mileage that is (in some cases) only about 60% of the EPA numbers.