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  1. Better MPG / fuel gas efficiency economy

    I think I read on here a thread that removing the rack up top helps fuel economy. I tried to search for it, but cant find the thread anymore Is there anything one can do to bring up the miles per gallon? Besides the typical - clean the throttle body, coast more, carry less, slow acceleration...
  2. 2006 Envoy - P0128 / mileage question

    Just purchased a 2006 Envoy 4.2 - 119K. Threw a P0128 code and had it reset and I've found lots of information (t-stat) on the code. I've got a couple of questions: 1 - What is the optimal temperature that I should look for? Right now it's showing a hash-mark or 2 short of 210 degrees F. Is...
  3. 6 cyl mileage survey... / TB-Envoy recommendations needed!!!

    Engine Tunes/Mods
    OK - I need help from all of you 6 cyl owners out there (which should be MOST of you!!!). My wife and I are trying HARD to convince her Mom that she needs to get an Envoy (which a local dealer has put her in for the weekend with 38K miles) over a Mercury friggin Mariner... What I want to know...