1997 Buick Park Avenue Owner's Manual - Page 278

When to Add Oil If the oil is at orbelow the ADD mark, then you'll need to add at least one quart of oil. But you must use the right kind. This part explains what kind of oil use. to For crankcase capacity, see "Capacities and Specifications" in the Index, What Kind of Oil to Use Oils recommended for your vehicle can be identified by looking for the "Starburst" symbol. This symbol indicates that the oil has been certified by the American Petroleum Institute (API). Do not use any oil which does not carry thisStarburst symbol. If you change your own oil, be sureyou use oil that has the Starburst symbol on the front of the oil container. If you have your oil changed for you, be sure the oil put into your engine is American Petroleum Institute certified for gasoline engines. You should also use the proper viscosity oil for your vehicle, as shown in the following chart: NOTICE: Don't add too much If your engine has oil. so much oil that the oil level gets above the cross-hatched area that shows the proper operating range, your engine could be damaged. Add engine oil at theengine oil fill cap next to the oil dipstick. Be sure to fill it enough to put the level somewhere in the proper operatingrange. Push the dipstick all the way back in when you're through. 6-14