2009 Toyota Tundra Owners Manual - Page 520

4-3. Do-it-yourself maintenance NOTICE n Do not use any fluid other than washer fluid Do not use soapy water or engine antifreeze instead of washer fluid. Doing so may cause streaking on the vehicle's painted surfaces. n Diluting washer fluid Dilute washer fluid with water as necessary. Refer to the freezing temperatures listed on the washer fluid tank. 4 Maintenance and care 493