Well as of now the truck has been holdin steady at 21.5-22mpg on the highway. i just put a fuel additive called XTane into the tank. it claims a 20% minimum increase in gas mileage on any vehicle and up to 35% maximum. Im driving up to michigan from PA later on tonight so ill let you know how it goes.
still on my never ending quest for better gas mileage

-keyul