1997 Lincoln Mark VIII Owner's Manual - Page 256

To make sure that the catalytic converter and the other emission control parts continue to work properly: u Use only premium unleaded fuel. u Avoid running out of fuel. u Do not turn off the ignition while your vehicle is moving, especially at high speeds. In general, maintenance, replacement, or service of the emissions control devices or systems in your new Ford Motor Company vehicle or engine may be performed at your expense by any automotive repair establishment or individual using automotive parts equivalent to those which your vehicle or engine was originally equipped. 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. u Do not push start your vehicle. u 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. 251