1st this is my 1st post here. I'm just a regular guy not a mechanic, mechanically inclined. Would love any advice I can get.
My truck is a 2011 Ford F150 5.0 Crew Cab 4X4 113,000 miles. My issue is Gas Mileage. I've been reading a lot about what different people do to get better gas mileage and have figured out my best course of action is probably tuning up the engine. Can't afford to do everything at once so I'm starting out with little things. PCV, K&N air filter, change oil every 5k full synthetic 5w30, Oil separator Catch Can, and consistantly using 87 octane Gas from a reputable station. PROBLEM; I was going to replace the fuel filter, but my truck doesn't seem to have a fuel filter. ANYONE know what my truck uses instead of a fuel filter. And if fixing or replacing it or anything else might help me get better gas milage. FYI... Little more about the truck and my driving. I don't drive fast, I do use the AC, It's not hilly where I live. Driving is 50 50 city hwy. But I'm mostly concerned about hwy milage. I use cruise control on long trips over 25 hwy miles. Truck has bedcover, I don't have any extra weight in the truck, My tires are road and dirt michelin regular tires, I'm told my truck should get 17 city 23 hwy milage. Average mileage is 12/14 combined. Highway is 16 to 18 if I drive like grandma going to church. Any suggestions would be greatly appreciated. & Please keep the wisecracks to a minimum🙏👍 Thanks in advance for any help.

 

It's inside the tank with the fuel pump. and ditch the K&N... it does nothing for performance, mpg, etc. and it CAN contaminate the intake sensors.

 

There isn't a lot of "tuning up" on a modern engine. There isn't much to do except plugs every 100k or so and maybe clean out your throttle body every once in a while, change your air filter if it's dirty, etc. That fuel economy does seem low if your driving pattern is like you say. The truck isn't lifted or anything? Stock tire size?