Buick PARKAVENUE 1994 Manual page 128

If you're "idling" at a stop sign, the light may blink
on
and then off.
If you make a hard stop, the light may come on for a
moment.
When this light comes on and stays on,
it
means oil isn't
going through your engine properly, You could be low
on oil, or you might have some other oil problem.
NOTICE:
Damage to your engine from neglected oil
problems can be costly and is not covered by
your warranty.
"Check Oil Level" Light (Option)
CHECK
OIL LEVEL
The "Check Oil Level"
light is lit for three seconds
as a bulb check each time
the ignition key is turned to
the RUN position. If the
light doesn't come on, have
your vehicle serviced.
If the engine oil is more than one quart low, the light
will come on briefly, then go off for 15-25 seconds, and
then come back on for 20-40 seconds.
However, the system will not register low engine oil if
it
has not been more than eight minutes since the engine
was last shut off.
If the "Check Oil Level" light comes back on, the
engine oil should be checked at the.dipstick then
brought up to the proper level if necessary. See "Engine
Oil" in the Index.