FWIW, I lowered my truck 4 inches and did realize a 1 MPG improvement. My truck was fairly tall, so potholes and high-centering were not issues to me and my lowering is static.
It does work but whether or not its worth the hassle and expense is a value judgment.
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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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