1997 Oldsmobile Cutlass Supreme Owner's Manual - Page 245

Brakes Brake Fluid There are onlytwo reasons why the brake fluid levelin the reservoir might go down. The first is that the brake fluid goes down toan acceptable level during normal brake lining wear. When new linings are put in,the fluid level goes back up. The other reason 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 or later your brakes won't work well, or won't work a at l l . So, it isn't a good idea to "top off' your brakefluid. Adding brake fluid won't correct a leak. If you add fluid when your linings are worn, then you'll have too much fluid whenyou get new brake linings. You should add (or remove) brake fluid, as necessary, only when work is done on the brake hydraulic system. Your brake master cylinder reservoir is here. It is filled with DOT-3 brake fluid. If you have too much brake fluid,can it spill on the engine. The fluid will burn if the engineis hot enough. You or others could be burned, and your vehicle could be damaged. Add brake fluid only when work is done on the brake hydraulic system. 6-22