1997 Pontiac Grand Prix Owner's Manual - Page 288

NOTICE: Use only engine oilwith the American Petroleum Institute Certified For Gasoline Engines "Starburst" symbol. Failure to use the recommended oilcan result in engine damage not covered byyour warranty. GM Goodwrench@oil meets all the requirements for your vehicle. When to Change Engine Oil If any one of these is true foryou, use the shorttrip/city maintenance schedule: 0 Most trips are less than 5 to 10 miles (8 to 16 km). This is particularly important when outside temperatures are below freezing. 0 Most trips include extensive idling (such frequent as driving in stop-md-go traffic). 0 Most trips are through dusty areas. You frequently tow a trailer or use a carrier on top of your vehicle. If you are in an area where the temperature falls below -20°F (-29*C), consider using either an SAE 5W-30 synthetic oil oran SAE OW-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. Engine Oil Additives Don't add anything to your oil. Your Pontiac dealer is ready to advise if you think something should be added. The vehicle is used for delivery s'ervice,police, taxi or other commercial application, Driving und'erthese conditions causes engine to oil break down sooner, If any one of these is true €or your vehicle, then you need to change your oil and filter every 3,000 miles (5 000 km) or 3 months -- whichever occurs first. (See "Change Oil Indicator" in the Index.) If none of them is true, use the long triphighway maintenance schedule. Change th'eoil and filter every 7,500 miles (12 500 k ) 12 months -- whichever m or occurs first, Driving a vehicle with a fully warmed engine under highway conditions causes engine oil to break down slower. (See "Change Oil Indicator" in the Index.) 0 6-18