Section 10-01A: Fuel Tank, Filters, Tubes and Electric Fuel Pump, Gasoline Engines | 1996 F-150, F-250, F-350, F-Super Duty and Bronco with Gasoline Engines Workshop Manual |
The fuel tank filler pipe (9034) openings for the fuel tanks (9002) on trucks with multiport fuel injection (MFI) engines (6007) have been made smaller to prevent accidental filling with other than unleaded fuel. Gasoline pumps in the United States and Canada dispensing unleaded fuel are equipped with nozzles to accommodate the smaller filler opening on the filler neck.
Expansion of fuel due to temperature increases, or overfilling ("topping off") causes fuel overflow at the fuel tank filler cap (9030) when the vehicle is standing or the fuel tank filler cap is removed. To minimize this condition, it is recommended that the amount of fuel put in the fuel tank when filling be limited to the automatic pump shutoff. If vehicle has two fuel tanks, use fuel from both fuel tanks after fill-up to reduce fuel levels.