I have a 06 F150 with the 5.4 and a K&N CAI and get 17 - 18 highway. I did notice a difference in mileage when pulling but would love to get a tuner also to see if nothing else it helps when towing. I too was looking at the Edge EVO and darn near pulled the trigger just before vacation but bent a prop an bought a new prop instead. What I liked about this one is that it had three tunes you could switch to. One was for gas mileage, the next was for towing and the last was for premium performance. I would still like to buy one of these but I'm waiting for someone to buy one first and tell us how it worked.