I here a lot of people talk about getting over 20 mpg, but I am only getting 13-15 mpg even with highway driving. I have a 97 sport 4wd, 31-10.50 tires, torsion and shackle lift, 3.73 gears, KKM, Borla exhaust, superchip, new bosch +4 plugs and new wires. My truck has 107000 miles on it.
My...