1998 Cadillac DeVille Owner's Manual - Page 316

What to Add When you do need brake fluid, use only DOT-3 brake fluid -- such as Delco Supreme 11' (GM P r at No. 12377967). Use new brake fluid from a sealed container only. Always clean the brake fluid reservoir and the cap area aroundthe cap before removing it. This will help keep dirt from entering the reservoir. NOTICE: Using the wrong fluid can badlydamage brake system parts.For example, just a few drops of mineral-based oil, such as engine oil, in your brake system candamage brake system parts so badly that they'll have to be replaced. Don't let someone put in the wrong kindof fluid. If you spill brake fluidon your vehicle's painted surfaces, the paint finish can be damaged. Be careful not to brake fluid spill on yourvehicle. If you do, wash it off immediately. See "Appearance Care" in the Index. With thewrong kind of.fluid in your brake system, your brakesmay not workwell, or they may not even work all. This could cause a at crash. Always use the proper brake fluid. 6-29