Buick REGAL 1997 Manual page 287

Before closing the hood, be sure all the filler caps are
on properly. Then just pull the hood down and close
it firmly.
3800 Supercharged (Code 1) Engine
(If Equipped)
Your Buick may have a 3800 Supercharged engine.
The supercharger is a device which is designed to
pump more air into the engine than it would normally
use. This air is mixed with fuel, which creates increased
engine power. Since the supercharger is a pump and is
driven from an engine accessory drive belt, increased
pressure is available at all driving conditions.
The powertrain control module (PCM), works with
a vacuum control to regulate the increased pressure
required during specific driving conditions. When this
increased pressure or boost is not desired, such as during
idling and light throttle cruising, the excess air that the
supercharger is pumping is routed through a bypass.
All of these controls working together provide high
performance character and fuel efficiency in the
3800 Supercharged L67 engine.
Engine I
--
LOW
OIL
If the LOW OIL light on
the instrument panel comes
on, it means you need to
check your engine oil
level right away. For more
information, see "Low Oil
Level Light" in the Index.
You should check your
engine oil level regularly;
this is an added reminder.
It's a good idea to check your engine oil every time
you
get fuel. In order to get an accurate reading, the oil must
be warm and the vehicle must be on level ground.
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