1994 Oldsmobile Achieva Owner's Manual - Page 192

Service & Appearance Care leak. If you add fluid when your linings are worn, then you'll have too much fluid when you get new brake linings. You should add (or remove) brake -fluid,as necessary, only when work is done on the brake hydraulic system. brake fluid reservoir cap before removing it. NOTICE: Don't let someone put in the wrong kind of fluid. 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. Brake fluid can damage paint, so be careful not to spill brake fluid on your vehicle. If you do, wash it off immediately. See Appearance Care in the Index. Brakes Brake Master Cylinder Your brake master cylinder is here. It is filled with DOT-3 brake fluid. There are only two reasonswhy the brake fluid level in your master cylinder might go down. Thefirst is that the brake fluid goes down to anacceptable level during normal brake lining wear. When new linings are put in,the fluid level goes back up. The otherreason is that fluid is leaking out of the brake system. If it is,you should have your brake system fixed, since a leak means that sooner orlater your brakes won't work well, or won't work at all. So, it isn't agood idea to "topoff" your brake fluid. Adding brake fluid won't correct a 190 When your brake fluid falls to a low level, your brake warning light will come on. See Brake System Warning Light in the Index. What to Add When you do need brake fluid, use only DOT-3 brake fluid - such as Delco Supreme 110 (GM Part No.1052535). Use new brake fluid from a sealed container only, and always clean the Brake Wear Your Oldsmobile has front disc brakes and rear drum brakes. Disc brake pads have built-in wear indicators that make a high-pitched warning sound when the brake pads are worn and new pads are needed. The sound may come and go or be heard all the time your vehicle is moving(except when you are pushing on thebrake pedal firmly).