1994 Buick Skylark Owner's Manual - Page 218

When to Change Engine Oil See if any oneof these is true for you: 0 0 Most trips are less than 4 miles (6 km). ,It's below freezing outsideand 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, orin stop-and-go traffic). 0 You tow a trailer often. Most trips are through dusty places. NOTICE: If you use oils that do not have either the "starburst" symbol or API SH or SG an If any one of these is true for your vehicle, then you need to change youroil and filterevery 3,000 'miles (5 000 km) or 3 months -- whichever comes first. If none of them is true, change the every 7,500 miles oil (12 500 km) or 12 months -- whichever comes first. Ckiange the filter at the first oil change and'at every other oil change after that. designation, you can cause engine damage not covered by your warranty. GM Goodwrench@ (in Canada, GM Engine Oil) oil meets all the requirements for your vehicle. Engine Coolant Heater (Engine Block Heater) An engine coolant heater can be a big help if you have to park outside in very cold weather, (- 18 "C) or 0°F colder. If your vehicle has this option, see "Engine Coolant Heater" in the Irtdex. Engine Oil Additives Don't add anything to your oil. Buick dealeris Your ready to advise you think something should be added. if 31 L: