Saturn 2007 Sky Owner's Manual page 246

When to Add Engine Oil
If the oil is below the MIN (minimum) mark, you
will need to add at least one quart/liter 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 331.
Notice: Do not add too much oil. If the
engine has so much oil that the oil level
gets above the upper mark that shows the
proper operating range, the engine could
be damaged.
246
2.4L L4 Engine
See Engine Compartment Overview on page 242
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.
2.0L L4 Engine