2003 Oldsmobile Alero Owner's Manual - Page 238

When to Check and What to Use Schedule to determine how often you should check the fluid level in your master cylinder reservoir and for the proper fluid. See Part B: Owner Checks and Services on page 6-9 and Part D: Recommended Fluids and Lubricants on page 6- 15. Engine Coolant The cooling system in your vehicle is filled with DEX-COOL@ engine coolant. This coolant is designed to remain in your vehicle for 5 years or 150,000 miles (240 000 km), whichever occurs first, if you add only DEX-COOL@ extended life coolant. The following explains your cooling system and how to add coolant when it is low. If you have a problem with engine overheating, see Engine Overheating on page 5-26. A 50/50 mixture of clean, drinkable water and DEX-COOL@ coolant will: Give freezing protection down to -34°F (-37°C). Give boiling protection up to 265°F (129°C). How to Check and Add Fluid You do not need to check the fluid level unless you suspect a clutch problem. To check the fluid level, take the cap off. If the fluid level reaches the top of the reservoir, the fluid level is correct. It isn't a good idea to top off your clutch fluid. Adding fluid won't correct a leak. A fluid loss in this system could indicate a problem Have the system inspected and repaired. @ Protect against rust and corrosion. Help keep the proper engine temperature. Let the warning lights and gages work as they should. @ 5-23