I always use the normal mode and average around 22mpg in rural and city. I tried the eco once and it didn't seem to have the power I like on the highway. Seems like I get better mpg using normal. I use tow mode pulling the boat which is around 4000 pounds and averaged around 16 mpg. STX has 3.31...
I have a 22 4x4 with 6700 miles and I average around 22 - 22.5 mpg. Everything is stock on except for a bed liner and tonneau cover I put on it. It also has the stock 20's.
What is the best coilovers for leveling and does it effect the steering and handling of the truck. Will it void the warranty once you install the coilovers?