Aerostar 2WD V6-245 4.0L (1990)
Fuel Filler System
FUEL TANK FILLER NECK
To prevent accidental filling with other than unleaded fuel, vehicles that require unleaded fuel have a special filler tube. This filler tube has a restriction
in it so that the only nozzles that can be inserted are the smaller diameter nozzles of pumps dispensing unleaded fuel.
It is recommended that the amount of fuel put in the tank when filling be limited to the automatic pump shutoff. Due to the expansion of fuel during
temperature increases, or overfilling ("topping off") can cause fuel overflow at the filler cap when the vehicle is standing or the cap is removed. If the
vehicle has two tanks, use fuel from both tanks after fill-up to reduce fuel levels.
Orifice Rollover Valve