Subaru Tribeca Manuals: 2011 Tribeca Owner's Manual | Page 362

11-30 Maintenance and service Windshield washer fluid Washer Fluid Concentration 30% CAUTION Freezing Temperature 10.48F (−128C) 50% −48F (−208C) 100% Never use engine coolant as washer fluid because it could cause paint damage. −498F (−458C) CAUTION Never use engine coolant as washer fluid because it could c W6R