1996 Oldsmobile 88 Owner's Manual - Page 245

When to Add Oil If the oil is at or below ADD mark, then you'll need the to addat least one quart of oil. But you must use the right kind. This part explains what kind to use. For of oil crankcase capacity,see "Capacities and Specifications" in the Index. What Kind of Oil to Use Oils recommendedfor your vehicle can identified by be looking for the "Starburst" symbol. This symbol indicates that the has been certifiedby the American oil Petroleum Institute (API). Do not use any which oil does not carrythis Starburst symbol. If you change your own oil, be sure you use that has oil the Starburst symbol the on front of the oil container. If you have youroil changed for you, be sure oil put the into your engineis American Petroleum Institute certifiedfor gasoline engines. NOTICE: ~ Don't add too much If your engine has oil. so much oil that theoil level gets above the cross-hatched area that shows the proper operating range, your engine could be damaged. The engine oil fl cap is behind the engine oil dipstick il and engine fans. Be sure tofill it enough to put level somewhere in the the proper operating range. Push dipstick allthe way the back in when you're through. You should also use the proper viscosity for your oil vehicle, as shown in following chart: the 6-13