Pontiac 2005 Vibe - Manual (Page 239)

When to Add Engine Oil
If the oil is at or below the hole at the tip of the dipstick,
then you will need to add at least one quart of oil.
But you must use the right kind. This section explains
what kind of oil to use. For engine oil crankcase
capacity, see Capacities and Specifications on
page 5-100.
Notice: Do not add too much oil. If your engine has
so much oil that the oil level gets above the upper
hole, your engine could be damaged.
See Engine Compartment Overview on page 5-12 for
the location of the engine oil fill cap.
Be sure to add enough oil to put the level somewhere
in the proper operating range. Push the dipstick all
the way back in when you are through.
1.8L L4 (VIN Code L) Engine
5-17