1993 Buick Park Avenue Owner's Manual - Page 256

0 SAE low-30 As shown in this chart, SAE 1OW-30 is best for your vehicle. However, you can use SAE 5W-30 if it's going to be colder than 60 O F (16 " C) before your next oil change. When it's very cold, below 0°F (- 18" C), you should use SAE 5W-30. When to Change Engine Oil: See if any one of these is true foryou: 0 Most trips are less than 4 miles (6 km). It's below freezing outside and most trips are less than 10 miles (16 km). The engine is at low speed most of the time (as in door-to-door delivery, or in stop-and-go traffic). These numbers on an oil container show its viscosity, or thickness. Do not use other viscosity oils such as SAE low-40 or SAE20W-50. 0 0 You tow a trailer often. Most trips are through dusty places. Energy Conserving I1 Oils with these words on the container will help you save fuel. This doughnut-shaped logo (symbol) is used on most oil containers to help you select the correct oil. You should look for this on the oil container, and use only those oils that display the logo. 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 Soon" in the Index.) GM Goodwrench@oil (in Canada, GM Engine Oil) meets all the requirements for your vehicle. Engine Oil Additives: Don't add anything to your oil. Your Buick dealer is ready to advise if you think something should be added. If none of them is true, change the oil every 7,500 miles (12 500 km) or 12months -- whichever comes first. Change the filter at the first oil change and at every other oil change after that. (See "Change Oil Soon" in the Index.) Engine Block Heater: An engine block heater can be a big help if you have to park outside in very cold weather, -20" F (-29 "C) or colder. If your vehicle has this option, see "Engine Block Heater." in the Index.