Ford Mystique Owner's Manual page 214

To make sure that the catalytic converter and the other emission
control parts continue to work properly:
Use only unleaded fuel.
Avoid running out of fuel.
Do not turn off the ignition while your vehicle is moving,
especially at high speeds.
Have the services listed in the Maintenance Schedule booklet
performed according to the specified schedule. The scheduled
maintenance services are required because they are
considered essential to the life and performance of your
vehicle and to its emissions system.
Ford strongly recommends the use of genuine Ford replacement
parts. If other than Ford or Motorcraft parts or Ford authorized
remanufactured parts are used for maintenance replacements or
for the service of components affecting emission control, such
non-Ford parts should be equivalent to genuine Ford Motor
Company parts in performance and durability. It is the owner's
responsibility to determine the equivalency of such parts. Please
consult your warranty booklet for complete warranty
information.
Do not park, idle, or drive your vehicle in dry grass or
other dry ground cover. The emission system heats up
the engine compartment and exhaust system, which can
start a fire.
Watch for fluid leaks, strange odors, smoke, loss of oil pressure,
the charge warning light, the check engine light, or the
temperature warning light. These sometimes indicate that the
emission system is not working properly.
Maintenance and Care
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