I got the 4.7L v8 new and i have owned the vehicle for 60,000 miles. I get 16.9 mpg. The biggest and only issue i had with this truck was the oem front braking system that only lasted a few thousand miles. Lets just say after the nightmare of having to deal with there service dpt. I finally had enough and just spent the money and replaced all the front braking system. Suspension could also use some work.