Ford Ranger Owner's Manual page 308

Body
Wash vehicle thoroughly to remove dirt, grease, oil, tar or
mud from exterior surfaces, rear wheel housing and
underside of front fenders.
Periodically wash vehicles stored in exposed locations.
Touch-up raw or primed metal to prevent rust.
Cover chrome and stainless steel parts with a thick coat of
auto wax to prevent discoloration. Re-wax as necessary when
the vehicle is washed.
Lubricate all hood, door and trunk lid hinges and latches
with a light grade oil.
Cover interior soft trim to prevent fading.
Keep all rubber parts free from oil and solvents.
Engine
Start engine every 15 days. Run at fast idle until it reaches
normal operating temperature.
With your foot on the brake, shift through all the 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.
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.
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