After all of my mods I have done, I am now getting 19.5 highway with my truck. Not being satisfied with that, I am continuing to do things that are inexpensive that will cause me to see gains. I recently changed my plugs out to some Halo Plugs made by LSGBRISK. Some people think these are a joke, but they are the ones who have never tried them. From what I have found, those who have tried them have nothing but good things to say about them. I will be keeping you all posted as to the results of my little endeavor.
This is where I bought them from, they are here in Kansas and I had them in 3 days. He has been a great person to work with.