I'm running the advance as far as conditions will tolerate. I do have to get it started in cold weather. I have another setting with more advance for warm weather. It helps a little (<1 MPG).
I've tried IAP all over the place. It has almost no effect on MPG.
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2000 Ford F-350 SC 4x2 6 Speed Manual
4" Slam
3.08:1 gears and Gear Vendor Overdrive
Rubber Conveyor Belt Air Dam
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