Cadillac 2007 DTS - Manual (Page 358)

When to Add Engine Oil
If the oil is below the cross-hatched area at the
tip of the dipstick, 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 452.
Notice: Do not add too much oil. If the engine
has so much oil that the oil level gets above
the cross-hatched area that shows the
proper operating range, the engine could
be damaged.
See Engine
Compartment Overview
on page 356 for the
location of the engine
oil fill cap.
Turn the cap counterclockwise to remove it.
Be sure to add enough oil 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 are through.
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