1997 Buick Regal Owner's Manual - Page 304

NOTICE: 0 Brakes Brake Fluid 0 0 0 When using concentrated washer fluid, follow the manufacturer's instructions for adding water. Don't mix water with ready-to-use washer fluid. Water can cause the solution to freeze and damage your washer fluid tank and other parts of the washer system. Also, water doesn't clean as well as washer fluid. Fill your washer fluid tank only three-quarters full when it's very cold. This allows for expansion if freezing occurs, which coulddamage the tankif it is completely full. Don't use radiator antifreeze in your windshield washer. It can damage your washer system and paint. Your brake master cylinder reservoir is here. It is filled with DOT-3 brake fluid. 6-28