1998 Oldsmobile Cutlass Owner's Manual - Page 235

As shown in the chart, S A E 5W-30 is best for your SAE 1OW-30 if it's going vehicle. However, you can use to be 0°F (-18°C) or above.These numbers on an oil container showits viscosity, or thickness. Do not use other viscosityoils, such as SAE 2OW-50. Engine Oil Additives Don't add anything to your Your retailer is ready to oil. advise if you think something should be added. When to Change Engine Oil If any one of these is true for you, use short tripkity the maintenance schedule: 0 NOTICE: Use only engine oil with the American Petroleum Institute Certified For Gasoline Engines "Starburst" symbol. Failure use the to recommended oil can result in engine damage not covered by your warranty. GM Goodwrench@oil meets all the requirements for your vehicle. If you arein an area where the temperature falls below -20°F (-29"C), consider using either an SAE 5W-30 Most trips areless than 5 to 10 miles (8 to 16 h . ) This is particularly important when outside temperatures are below freezing. Most trips include extensive idling (such as frequent driving in stop-and-go traffic). Most trips are through dusty areas. You frequently tow a trailer use a carrier on top or of your vehicle. The vehicle is used for delivery service, police, taxi or other cornmercial application. 0 0 0 0 synthetic oil or an SAE OW-30 oil. Both will provide easier cold starting and better protection your engine for at extremely low temperatures. Driving under these conditions causes engine oil to break down sooner. If any of these is true for your one vehicle, then you need to change yourand filter oil m or every 3,000 miles (5000 k ) 3 months -- whichever occurs first. 6-15