Hello all, I am new to the site but have used it in the past to help modify my truck. The truck is a 2002 regular cab 310 000kms - 192 000 miles, - step side. 4.8 auto, z71, 3:73 gears. I absolutely love the truck and it's been great to me so far. I just did a lot of highway driving over the last two days with little city driving. I have recently replaced the plugs and wires, fuel filter and it has a ebay air intake kit. I got an amazing 11.8mpg while doing driving between 60 and 70 mph over a couple long trips. Seems a little low to me.. If anyone else could chime in with their numbers that would be great. I have tested the fuel pressure and it tested pretty low.. 41 psi, it does have one engine code for the evap filter being clogged. Thanks for any help.