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  1. A

    Boost my Fuel economy?

    Thanks for all the replies! Went and picked up a new thermostat, gonna install it on Friday and see if that helps anything. Spark plugs and wires are on the to do list also.
  2. A

    Boost my Fuel economy?

    New to the forum and just bought a 2000 XLT 4.0 SOHC a few months ago. The truck has 78K miles and I've recently done oil change, fuel filter, air filter, and cleaned the IAC valve. I've heard these trucks should get pretty good fuel economy but from the last three fill ups I've only been...
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