Originally Posted by G Steezy
I'll have to see if a salvage yard has the stock air cleaner assembly for a decent price. I new here and don't know mod you're referring to, but I'll look into it. I'm not too keen on the gauge, I don't want driving my truck to consist of constant worrying and viewing my gas mileage. Thanks for all the input guys. I'm open to any other idea's as well.
Even if you don't keep the gauge on 24/7, having it on to "tune in" while you try different fixes will be faster testing than waiting for each fillup (even at 12mpg). It will also help you see where your driving habits may be pulling you down.
Keep in mind that generally any mods that produce more power, often do so at the expense of worse gas mileage. Wider tires also are generally higher rolling resistance, so more fuel loss.
Engine would also be useful for getting a base idea of where your mileage should be. I get about 20mpg highway, 16mpg-ish highway when towing max load - but I've got a short bed, short cab, and only the 4.2L V6 so "max load" isn't much.