When To Add Engine Oil; What Kind Of Engine Oil To Use - Cadillac 2005 STS Owner's Manual

When to Add Engine Oil

If the oil is below the cross-hatched area 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 5-104.
Notice: Do not 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.
3.6L V6 Engine
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.
4.6L V8 Engine

What Kind of Engine Oil to Use

Look for two things:
•
GM4718M
Your vehicle's engine requires a special oil meeting
GM Standard GM4718M. Oils meeting this
standard may be identified as synthetic. However,
not all synthetic oils will meet this GM standard.
You should look for and use only an oil that meets
GM Standard GM4718M.
Notice: If you use oils that do not have the
GM4718M Standard designation, you can cause
engine damage not covered by your warranty.
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