1998 Buick Riviera Owner's Manual - Page 268

What to Add When you do need brake fluid, use only DOT-3 brake fluid -- such as Delco Supreme (GM Part 11 No. 12377967). Use new brake fluid from a sealed container only. @ NOTICE: 0 Always clean the brake fluid reservoir cap and the area around the cap before removing This willhelp keep it. dirt from entering the reservoir. r With the wrong kind fluid in your brake of system, yourbrakes may not workwell, or they may not even work at all. This could causea crash. Always use the proper brake fluid. 0 Using the wrong fluid can badly damage brake system parts. For example, just a few drops of mineral-based oil, such as engine oil, in your brake system can damage brake system parts so badly that they'll have to be replaced. Don't let someoneput in the wrong kind of fluid. If you spill brake fluid on yourvehicle's painted surfaces, the paint finish be can damaged. Be careful not to spill brake fluid on yourvehicle. If you do, wash it off immediately. See "Appearance Care" in the Index. 6-27