So, I recently hand calculated my mileage...11.8. Here is my info:
2004 scab, 5.4, 265 -70 -17 tires, 112k, mostly in town driving I'm getting roughly up to 300 miles a tank(26 gallon tank). I have within the last 3k miles changed the fuel filter, air filter, cleaned MAF, cleaned TB, spark plugs, rotors, pads and alignment.
What can I look for or into besides driving habits to get some better mileage? I've been driving very conservatively since I did the work to try and see a difference in mileage. Keeping it under 2k rpm.

 

And how much did you come up with?

 

sorry, I edited it. For some reason it sent the post before I finished.

 

So do you think 11.8 is good or bad? Sounds ok based on your driving.

 

Yep thats about right.

A man could try marvel mystery oil in the fuel. I picked up a little using it

 

That's about right for in town.

 

so that sounds normal to you guys? I could see if I was running bigger tires or jumping on the throttle or had some other mechanical issues. But for 32" tires and keeping it under 2k rpm with the recent filters, spark plugs and alignment I guess I was expecting to see a little more.

 

For in town that is normal. These engines suck gas like a hole was drilled in the tank when setting still and idling...like at stop signs and lights. I hate "going to town" for that reason. On the road I get 17-20, and in town, 9-12 mpg. It's the sad side of driving a truck.

 

IMHO Its all about inertia.. Just keep your truck rolling and avoid stopping as much as possible.. Stop signs unfortunately require a full and complete stop, but at stop lights give yourself a little room to keep rolling. Every-time you start rolling from a dead stop, you are under much greater load conditions and will require more fuel just to break the truck free from its "high load" static position... I can get about 13 -14 MPG's city and up to 20 highway if I try to focus on milage...

 

It's impossible to say one way or the other definitively. MPGs vary due to gas type, road condition, air resistance, cargo, the amount of lead in your foot, how many red stop lights you encountered, etc. Comparing your MPGs to someone else is like comparing nutritional information of state fair food. In other words, pointless.

There was a post with a very good explanation about the EPA estimates that show on your sticker. I'll see if I can find it. What were those for your truck? If you are somewhere in that range, your good to go. You can adjust your driving style, change your gas, get a tune, and maybe increase a couple of MPGs. You need to decide if those changes are worth it to you. I tried driving like Grandma for about 5 minutes and gave up.