Buick 2003 Regal Owner's Manual page 150

The Driver Information Center has three buttons that
control its functions.
The English/Metric (E/M), RESET and MODE buttons
for the Driver Information Center are located to the left of
the steering wheel, just below the instrument panel
cluster.
U M (EngIish/Metric): Press this button to change the
display from English to metric.
RESET: Press this button to reset the mode displayed.
MODE: Press this button to change the mode being
displayed.
Modes
AVG ECON (Average Economy): This mode shows
your average fuel economy since you last reset this
mode. Average fuel economy is viewed as a long term
approximation of your overall driving and driving
conditions. To learn the average fuel economy from a
new starting point, press the RESET button while
the average fuel economy is displayed in the DIC.
INSTANTANEOUS FUEL ECONOMY: This mode
shows your current fuel economy. Instantaneous fuel
economy varies with your driving conditions, such
as acceleration, braking and the grade of the road being
traveled. The instantaneous fuel economy display
cannot be reset.
OIL LIFE MONITOR: This mode shows an estimate of
the oil's remaining useful life. When the oil life index
is less than IO%, the CHANGE OIL SOON light
will come on. When you have the oil changed according
to the maintenance schedule. See Part A: Scheduled
Maintenance Services on page 6-4. You will have
to reset the CHANGE OIL SOON light.
To reset the CHANGE OIL SOON light, see "How to
Reset the System" under Engine Oil on page 5-15.
Also, see "When to Change Engine Oil (GM Oil
Life SystemTM)" under Engine Oil on page 5-15 and Part
A: Scheduled Maintenance Services on page 6-4.
RANGE: This mode shows the approximate distance
you can drive without refueling. This is based on
the amount of fuel in the tank and on the fuel economy
of the most recent 25 miles (40 km). This display
cannot be reset..
BOOST GAGE: If you have the supercharged engine,
this gage will show the amount of boost your engine
is receiving. This display cannot be reset.
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