Ford 1996 Windstar Manual page 367

Engine
Start the engine every fifteen days. Run it at fast idle until it
reaches normal operating temperature.
With your foot on the brake, shift the transaxle into all gears
while the engine is running.
Fuel system
Fill fuel tank with high-quality unleaded fuel until the first
automatic shutoff of the fuel pump nozzle.
The fuel filter, fuel supply lines and engine are
maintained under pressure. This pressure must be
relieved prior to servicing the fuel filter and engine
compartment connections in order to avoid the danger of
fuel spray.
NOTE: During extended periods of vehicle storage (60 days or
more), fuel may deteriorate due to oxidation. This can
damage rubber and other polymers in the fuel system
and may also clog small orifices.
Ford Gas Stabilizer should be added whenever actual or
expected storage periods exceed 60 days. Follow the instructions
on the label. The vehicle should then be operated at idle speed
to circulate the additive throughout the fuel system.
A volatile corrosion inhibitor added to the fuel system will
protect the fuel system's inner surfaces from corrosion. Follow
the instructions packaged with the product.
Servicing Your Windstar
RWARNING
367