Lincoln 2001 LS Owner's Manual page 242

Maintenance and care
Ford Dealer. Do not use abrasive cleansers on glass as they may cause
scratches. The windshield or rear window is clean if beads do not form
when you rinse it with water. The windshield, rear window and wiper
blades should be cleaned on a regular basis, and blades or rubber
elements replaced when worn.
Cleaning the engine
Engines are more efficient when they are clean because grease and dirt
buildup keep the engine warmer than normal. When washing:
Take care when using a power washer to clean the engine. The high
pressure fluid could penetrate the sealed parts and cause damage.
Do not spray with cold water to avoid cracking the engine block or
other engine components.
Never apply anything to the drive belt (including belt dressing).
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