1993 Buick Riviera Owner's Manual - Page 91

A CAUTION: Driving without washer fluid can be dangerous. A bad mud splash can block your vision. You could hit another vehicle or go off the road. Checkyour washer fluid level often. In freezing weather, don't use your washer until the windshield is warmed. Otherwise the washer fluid can form ice on the windshield, blocking your vision. 89