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Diesel Power has tested another one of these devices, and it successfully increased milage in a test truck. Has anyone put one of these tested one in their own vehicle?
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2002 F350 CC, SB XLT 6spd, Luk clutch, 285/75R16 Goodyear Wrangler Silent Armor
4" Magnaflow Turbo Back Exhaust
DP Tuner: 80econo, 60econo, 40tow high Idle
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