Yea, know that it may not be the best and a pain to change when I tow, but it has worked pretty well in my 6.0's in the past. They did have a glitch in one of the last updates that did not allow it to install any type of power. It seems to be fixed in the latest update. In my 2 '04's I was getting 19-22 mpg at 60 mph on 2 lane roads with 285 tires. Now with the '06 it looks like 15.5 mpg is what it is willing to get. About the same with or with out the programer, just a little bigger smile with.
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