1995 Pontiac Bonneville Owner's Manual - Page 228

As shown in the chart, SAE 1OW-30 is best for your vehicle. However, you can SAE 5W-30 if it's use going to be colder than 60"F ( 16"C) before your next oil change. When it's very cold, should use you SAE 5W-30. These numbers on an oil container show its viscosity, or thickness. Do not use other viscosity oils, such as SAE 20W-50. When to Change Engine Oil See if any one of these is true for you: 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 as frequent driving in stop and go traffic). Most trips are through dusty areas. You frequently tow a trailer or use a carrier on top of your vehicle. NOTICE: Use only engine oil with the American Petroleum Institute Certified For Gasoline Engines "Starburst" symbol. Failure to use the proper oil can result in engine damage not covered by your warranty. GM Goodwrench@oil (in Canada, GM Engine Oil) @ If any one of these is true for your vehicle, then you need to change your oil and filter every 3,000 miles (5 000 km) or 3 months -- whichever comes first. (See "Change Oil Indicator" in the Index.) If none of them is true, change the oil and filter every 7,500 miles (12 500 k ) 12 months -- whichever m or comes first. meets all the requirements your vehicle. for Engine Oil Additives Don't add anything to your oil. Your Pontiac dealer is ready to advise if you think something should be added. Engine Coolant Heater An engine coolant heater can be a bighelp if you have to park outside in very cold weather, 0°F (- 18°C) or colder. If your vehicle hasthis option, see "Engine Coolant Heater" in the Index. 6-15