1994 Oldsmobile 88 Owner's Manual - Page 196

Service & Appearance Care These three things are usually included in a doughnut shaped logo (symbol) on most containers. If you cannot find oils with the "starburst" symbol, you should look foroils with the doughnutshaped symbol, containing the three things noted above. NOTICE: If you use oils that do not have either the "starburst"symbol or an API SH or SG designaiion, you can cause engine damage not covered by your warranty. GM Goodwrench@oil (in Canada, GM Engine Oil) meets all the requirements for your vehicle. Engine OilAdditives Don't add anything to your oil. Your OIdsmobile dealer is ready advise if to you think something should be added. When to Change Engine Oil See if any oneof these is true for you: 194 Most trips are less than4 miles (6 k ) m. It's below freezing outside most and trips are less than 10 miles (16 ltm) . The engine is at low speed most of the time (asin door-to-door delivery, or in stop-and-go traffic). You tow a trailer often. Most trips are through dusty places. If any one of these is true foryour vehicle, then you need to change your oil and filter every 3,000 miles (5 000 ltm) or 3 months - whichever comes first. (See Change Oil Indicator in the Index.) If the CHANGE OIL NOW message appears in the optional Driver Information Center, you should change your oil. If none of them is true, change the oil every 7,500 miles (12 500 lm) or 12 months -whichever comes first. Change the filter at the first oil change and atevery other oil changeafter that. (See Change Oil Indicator in the Index.) If your vehicle is equipped with the Driver Information Center, always reset the engine oil life to 100% after every oilchange.