Cadillac 2011 CTS Coupe Owner's Manual page 333

Change the engine oil at the
appropriate time. See
Always dispose of engine oil
properly. See What to Do with
Used Oil in this section.
It is a good idea to check the engine
oil level at each fuel fill. In order to
get an accurate reading, the vehicle
must be on level ground. The
engine oil dipstick handle is a yellow
loop. See
location of the engine oil dipstick.
1. If the engine has been running
recently, turn off the engine and
allow several minutes for the oil
to drain back into the oil pan.
Checking the oil level too soon
after engine shutoff will not
provide an accurate oil level
reading.
2. Pull out the dipstick and clean
it with a paper towel or cloth,
.
then push it back in all the way.
Remove it again, keeping the tip
down, and check the level.
If the oil is below the cross-hatched
area at the tip of the dipstick, add
1 L (1 qt) of the recommended oil
and then recheck the level. See
Selecting the Right Engine Oil
in this section for an explanation
of what kind of oil to use. For
engine oil crankcase capacity, see
for the
.
See
for the location of the
engine oil fill cap.
Add enough oil to put the level
somewhere in the proper operating
range. Push the dipstick all the way
back in when through.