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I am gettin 17 mpg right now. I swear I am extremely happy. I am fixing to get a af1 intake so maybe i will get lucky and get 18 mpg is that possible for a 2004 5.4 f-150 with 355 gears?
is yours 4x4? I think its great for a 4x4. I really am working on bumpin my mileage up every decimal counts. When gas is around 3 bills a gallon. WIll an af1 intake add a mile a gallon?