How much of the lift affect your gas mileage? My truck is my daily driver, and I'd love to lift it but don't want to dip down to like 14 miles a gallon

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1996 ranger 3.0 extended cab 2wd straight shift SOLD 6/13/15

2003 f150 4.2 regular cab 2wd straight shift still in the driveway

1998 f150 4.2 regular cab 2wd automatic daily driver