1993 Buick Regal Owner's Manual - Page 226

When to Change Engine Oil: See if any one of these is true foryou: Most trips are less than 4 miles (6 km). 9 weather, -20 F (-29 C) or colder. If your vehicle has this option, see "Engine Block Heater" in the Index. What to Do with Used Oil: It's below freezing outside and most trips are less than 10 miles (16 km). 9 The engi.ne is at low speed most of the time (as in door-to-door delivery, or in stop-and-go traffic). You tow a trailer often. 9 . - Most trips are through dusty places. If any one of thes,e 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. If none of them i s true, change the oil every 7,500 miles (12 500 km) or 12 months -- whichever comes first. Change the filter at the first oil change and at every other oil change afterthat. Used engine oil contains things that ha\, zaused skin cancer in laboratory animals. Don't let use6 oil stay on your skin for very long. Clean your skin and nails with soap and water, or a good hand cleaner. Washor properly throw away 4othing or rags containing used engine oil Engine Block Heater: An engine block heater can be a big help if you have to park outside in very cold Used oil can be a real threat to the environment. If you change your own oil, be sure to drain all free-flowing oil from the filter before disposal. Don't ever disposeof oil by pouring it on the ground, into sewers, or into streams or bodies of water. Instead, recycle it by taking it to a place that collects used oil. If you have a problem 224