1993 Buick Century Owner's Manual - Page 234

When t Change Engine Oil: See if any one of these is o true for you: Most trips areless than 4 miles (6 km). It's below freezing outside and most trips less than are 1 miles (16 km). 0 The engine is at low speed most the time (as in of door-to-door delivery,or in stop-and-go traffic). You tow a trailer often. Most tripsare through dusty places. What - toDo with UsedOil: /i\ CAUTION: Used engine oil contains things that have caused skin cancerin laboratory animals. Don't let used oil stay on your skin for very long. Clean your skin and nails with soap and water or a good hand cleaner. Wash or properly throw away clothing or rags containing used engine oil. Used oil can be a real threat to the environment. If you change your ownoil, be sure to drain all free-flowing oil If none of them is true, change the oil every 7,500 miles from the filter before disposal. Don't ever dispose of oil (12500 km) or 12 months-whichever comes first. by pouring it on the ground, into sewers, into streams or Change the fdter at the first oil change and at every other bodies of water. Instead, recycle it 'by takingto a or it oil change afier that. place that collects used If you have a problem oil. properly disposing of your usedoil, ask your dealer, a Engine Block Heater: An engine block heater can be a service station or a local recycling center for help. big help if you have to park outside very cold weather, in 0°F (-18°C) or colder. If your vehicle hasthis option, see "Engine Block Heater"in the Index. If any one of these is true for your vehicle, then you need to change youroil and filterevery 3,000 miles (5 O00 km) or 3 months-whichever comes first. 232