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The old chestnuts are tried and proven but just not all that effective for gas engine/automatic transmission cars (the vast majority).
They do all we tell them and drive wildly out of their comfort zone and get 1-2 MPG improvement. They want more. They think we are nuts and go back to texting while they drive.
Put a diesel in it and improve by at least 40%.
Put in a stick and gain another 20%.
Gas/automatic versions of my Super Duty struggle to get 10 MPG. Straight from the factory I got 18 MPG.
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2000 Ford F-350 SC 4x2 6 Speed Manual
4" Slam
3.08:1 gears and Gear Vendor Overdrive
Hard Tonneau and Rugged Air Dam
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