1995 Buick Roadmaster Owner's Manual - Page 227

As shown in the chart, SAE 5W-30 is best for your vehicle. However, youcan use S A E 1OW-30 if it's going to be0" F (- 18 C) or above. These numbers on an oil container showits viscosity, or thickness. Do not use other viscosity oils, such as S A E 20W-50. O When to Change Engine Oil See if any one of these is true for you: 0 Most trips are less than 5 to 10 miles (8 to 16 km). This is particularly important when outside temperatures are below freezing. Most trips include extensive idling (spch as frequent driving in stop and go traffic). 1 . NOTIC&: 0 Use only engine with the American Petroleum oil Most tripsare through dusty areas. Institute Certified For Gasoline Engines of "Starburst" symbol. Failure to use the proper oil 0 You frequently tow a trailer or use a carrier on top your vehicle. can result in engine damage not covered by your warranty. If any one of these is true for your vehicle, then you need to change your and filter every 3,000 miles oil (5 000 km) or 3 months -- whichever comes first. GM Goodwrench' oil (in Canada, GM Engine Oil) If none ofthem is true, change the and filter every oil meets all the requirements your vehicle. for 7,500 miles (12 500 k ) 12 months -- whichever m or Engine Oil Additives comes first. Don't add anything to your Your Buick dealeris oil. See "Change Oil Indicator" in Index for more the ready to adviseif you think something should be added. information on when to change oil. the ; " 6-11