1999 Buick LeSabre Owner's Manual - Page 251

yellowblue If none of them is true, use the long trip/highway maintenance schedule. Change the oil and filter every 7,500 miles (12 500 km) or 12 months -- whichever occurs first. Driving a vehicle with a fully warmed engine under highway conditions causes engine oil to break down slower. How to Reset the Engine Oil Life Monitor (Option) After changing the engine oil, the Engine Oil Life Monitor should be reset. It will not reset itself. This will cause the CHANGE OIL SOON light to be lit for a bulb check period of three seconds. Refer to "Engine Oil" in the Index to determine what type of oil to use. To reset the Oil Life Monitor, the ignition key must be in RUN. Press and hold the OIL RESET button (located in the glove box) for at least five seconds but not more than 60 seconds. After five seconds, the CHANGE OIL SOON light will flash four times and then go off. This indicates that the Engine Oil Life Monitor System has been reset. What to Do with Used Oil Did you know that used engine oil contains certain elements that may be unhealthy for your skin and could even cause cancer? 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. (See the manufacturer's warnings about the use and disposal of oil products.) 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 dispose of oil by putting it in the trash, 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 properly disposing of your used oil, ask your dealer, a service station or a local recycling center for help. 6-15