Pontiac 2003 Bonneville Owner's Manual page 276

When to Add Engine Oil
If the oil
is
at or below the cross-hatched area at the tip
of the dipstick, then you'll need to add at least one
quart of oil. But you must use the right kind. This part
explains what kind
of
oil
to use. For engine oil crankcase
capacity, see Capacities and Specifications on
page 5- 100.
Notice:
Don't add too much oil. If your engine has
so much oil that the oil level gets above the
cross-hatched area that shows the proper operating
range, your engine could be damaged.
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7
The engine oil fill cap is
located near the engine oil
dipstick. See Engine
Compartment Overview on
page 5-14 for more
information on location.
Be sure to fill it enough to put the level somewhere in
the proper operating range in the cross-hatched
area. Push the dipstick
all
the way back in when
you're through.
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