 I went with the 5.0 liter because i love the v8..dont like ecoboost motors and my mechanic friend said after looking at it that i got a great truck and he doesnt like ecoboost engines either..said gearing and engine were great..i have the 3.55 gears..i get 19.2 mpg highway and thats 70 to 80 mph..love how it sounds but gonna put borla atak exhaust on it and do a tune and mabey put drill slot rotors plus upgrade shocks then wheel tires and raise front to level it..not to much..mostly for looks..