Pontiac 2003 Aztek Owner's Manual page 310

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- 104.
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.
The engine oil fill cap is
located just behind the
engine oil dipstick.
See Engine Comparfment Overview on page 5-12 for
more information on location.
Be stire 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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