1999 Ford f250 super duty gas mileage Source Source Source Source Source Source Source Source Source Source Read Also: 1999 Ford f250 super duty diesel mpg 1999 Ford f250 diesel mileage 1999 Ford f250 super duty v10 gas mileage 1999 Ford f250 7.3l diesel mpg 1999 Ford f250 diesel mpg 1999 Ford f250 4x4 mpg