Thread: Real MPG Gains
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Old Mon, February 9th, 2009, 08:28 AM
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I don't have an F-150, but I do have an '05 Expy with the 5.4L engine. I saw an average gain of about 2+ mpg when Bill added the Gryphon to the vehicle. Right now, with winter blend fuel, it's more like 1 mpg.
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