Oldsmobile 1995 88 Owner's Manual page 125

When the oil life is zero, a tone will sound and the
display will show:
CHANGE OIL NOW
Then, when you start the vehicle, a tone will sound and
the CHANGE OIL NOW message will display each
time the vehicle is started.
To reset the oil life display after each oil change:
I. Acknowledge all diagnostic messages by pressing
2. Press SEL
to select OIL. Press SEL 4
if
RESET.
necessary to display the oil life.
3. Press and hold the RESET button for about five
seconds. Once the oil life index has been reset, a
RESET message will be displayed and then oil life
will change to 100%.
Be careful not to reset the oil life accidentally at any
time other than when the oil has just been changed. It
can't be reset accurately until the next oil change.
The DIC does not replace the Maintenance Schedule in
this manual. The oil change reminder will not detect
dusty conditions or engine malfunctions that may affect
the oil. If you drive in dusty areas, change your oil every
3,000 miles (5 000 km) or three months, whichever
comes first, unless the DIC instructs you to do so sooner.
The DIC does not measure how much oil is in the
engine. So, be sure to check your oil level often. See
"Engine Oil" in the Index.
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