GM: Electra/Park Avenue/Ninety-Eight 1990-1993

Oil Life Index (Oil Change Reminder)


One of the many uses of the Driver Information Center is to remind you to change your oil and show you what percentage of the oil that is in your engine is still usable. When you press the `oil' button on the display panel, the oil life index will be displayed. This is an estimate of oil life remaining before the next oil change is due. The system uses many variable to calculate this figure such as average coolant temperature, engine rpm, and vehicle speed.

When the remaining oil life is 10% or less, the system will calculate the approximate distance to the next oil change. The first time the car is started each day, a tone will sound and the display will show the aforementioned mileage calculation. This distance will decrease as the car is driven. When the mileage reaches 0 (zero), a tone will sound and the display will show `change oil now.'

This system does not replace the need for timely maintenance and cannot detect dusty or other adverse driving conditions that affect oil condition. Also, this system does not measure oil level in the engine, so be sure to check that regularly.


  1. Change the engine oil and filter. If your car is not equipped with a Driver Information System, then locate the reset button under the right side of the instrument panel and depress it to reset the light.
  3. If your car is equipped with a Driver Information System, then place the ignition switch to the Accessory or Run position.
  5. Push the 'OIL' button on the Driver Information Center panel to display the oil message.
  7. Push the 'OIL' and 'RESET' buttons simultaneously for 5-10 seconds.
  9. The display should now read 'OIL LIFE 100%'. Repeat if necessary.
  11. Do not attempt to intentionally trick or accidentally reset this system as this will only hurt you in the long run. The system cannot be set to any other value except 100%.