Not trying to hijack this thread but instead of posting a very similar one of my own, I too have been having some major MPG problems. I've owned this truck for close to a month now and going in I knew that its fuel economy would never come close to what I experienced with my Audi. But after 4 fill ups now I am averaging 10.8 mi/gallon?????? Now this driving is mostly city and I dont drive like a grandma so I was assuming I would never get the 15+ miles/gallon claims of some of you guys, but 10.8 seems just down right awful. After the first fill up, I ran a bottle of fuel system cleaner through and the economy never got better. The truck has new plugs, wires, oil change, and transfer case and transmission flushes. The truck only has 68,000mi on it.
The second puzzling thing is according to the PDF version of my 2004 owners manual, my fuel capacity should be 79L. I've waited until the empty light has come on and then still driven for a day or so further and have never been able to put more than 62L into the tank upon fill up. I know there is a reserve when the light comes on but 17L's difference???? Am i wrong for thinking somethings wrong here?