2016 CADILLAC XTS oil additives

Cadillac XTS Owner Manual (GMNA-Localizing-MidEast-9369806) - 2016 -
crc - 6/24/15
218 Driving and Operating
Fuel
Use the recommended fuel for
proper vehicle maintenance.
If the vehicle has the 3.6L V6 LFX
engine (VIN Code 3), use regular
unleaded gasoline with a posted
octane rating of 91 RON or higher,
otherwise an audible knocking noise
may be heard. If heavy knocking is
heard when using gasoline rated at
91 RON or higher, the engine needs
service.
If the vehicle has the 3.6L V6 LF3
twin turbo engine (VIN Code 8), use
premium unleaded gasoline with a
posted octane rating of 95 RON or
higher. If the octane is less than 95
RON, you could damage the engine
and may void the vehicle warranty.
If heavy knocking is heard when
using gasoline rated at 95 RON
octane or higher, the engine needs
service.
Use of Seasonal Fuels
Use summer and winter fuels in the
appropriate season. The fuels
industry automatically modifies the
fuel for the appropriate season.If fuel is left in the vehicle tank for
long periods of time, driving or
starting could be affected. Drive the
vehicle until the fuel is at one-half
tank or less, then refuel with the
current seasonal fuel.
Prohibited Fuels
Gasolines containing oxygenates
such as ethers and ethanol, as well
as reformulated gasolines, are
available in some cities. If these
gasolines comply with the
previously described specification,
then they are acceptable to use.
However, E85 (85% ethanol) and
other fuels containing more than
15% ethanol must be used only in
FlexFuel vehicles.
Caution
Do not use fuel containing
methanol. It can corrode metal
parts in the fuel system and also
damage plastic and rubber parts.
That damage would not be
covered under the vehicle
warranty.
Some gasolines, mainly high octane
racing gasolines, can contain an
octane-enhancing additive called
methylcyclopentadienyl manganese
tricarbonyl (MMT). Do not use
gasolines and/or fuel additives with
MMT as they can reduce spark plug
life and affect emission control
system performance. The
malfunction indicator lamp may turn
on. If this occurs, see your dealer
for service.
Fuel Additives
Gasoline should contain detergent
additives that help prevent engine
and fuel system deposits from
forming. Clean fuel injectors and
intake valves will allow the emission
control system to work properly.
Some gasoline does not contain
sufficient quantities of additive to
keep fuel injectors and intake valves
clean. To make up for this lack of
detergency, add Fuel System
Treatment PLUS to the fuel tank at
every engine oil change or every
15 000 km, whichever occurs first.
It is available at your dealer.

Cadillac XTS Owner Manual (GMNA-Localizing-MidEast-9369806) - 2016 -
crc - 6/24/15
236 Vehicle Care
Engine Oil Additives/Engine
Oil Flushes
Do not add anything to the oil. The
recommended oils meeting the
dexos1 specification are all that is
needed for good performance and
engine protection.
Engine oil system flushes are not
recommended and could cause
engine damage not covered by the
vehicle warranty.
What to Do with Used Oil
Used engine oil contains certain
elements that can be unhealthy for
your skin and could even cause
cancer. Do not let used oil stay on
your skin for very long. Clean your
skin and nails with soap and water,
or a good hand cleaner. Wash or
properly dispose of clothing or rags
containing used engine oil. See the
manufacturer's warnings about the
use and disposal of oil products.
Used oil can be a threat to the
environment. If you change your
own oil, be sure to drain all the oil
from the filter before disposal. Never
dispose of oil by putting it in thetrash or pouring it on the ground,
into sewers, or into streams or
bodies of water. Recycle it by taking
it to a place that collects used oil.
Engine Oil Life System
When to Change Engine Oil
This vehicle has a computer system
that indicates when to change the
engine oil and filter. This is based
on a combination of factors which
include engine revolutions, engine
temperature, and miles driven.
Based on driving conditions, the
mileage at which an oil change is
indicated can vary considerably. For
the oil life system to work properly,
the system must be reset every time
the oil is changed.
When the system has calculated
that oil life has been diminished, it
indicates that an oil change is
necessary. A CHANGE ENGINE
OIL SOON message comes on. See
Engine Oil Messages
0137.
Change the oil as soon as possible
within the next 1 000 km (600 mi).
It is possible that, if driving under
the best conditions, the oil life system might indicate that an oil
change is not necessary for up to a
year. The engine oil and filter must
be changed at least once a year
and at this time the system must be
reset. Your dealer has trained
service people who will perform this
work and reset the system. It is also
important to check the oil regularly
over the course of an oil drain
interval and keep it at the proper
level.
If the system is ever reset
accidentally, the oil must be
changed at 5 000 km (3,000 mi)
since the last oil change.
Remember to reset the oil life
system whenever the oil is changed.
How to Reset the Engine Oil
Life System
Reset the system whenever the
engine oil is changed so that the
system can calculate the next
engine oil change. To reset the
system:
1. Using the DIC controls on the right side of the steering wheel,
display REMAINING OIL LIFE

Cadillac XTS Owner Manual (GMNA-Localizing-MidEast-9369806) - 2016 -
crc - 6/24/15
Vehicle Care 241
Caution
If improper coolant mixture,
inhibitors, or additives are used in
the vehicle cooling system, the
engine could overheat and be
damaged. Too much water in the
mixture can freeze and crack
engine cooling parts. The repairs
would not be covered by the
vehicle warranty. Use only the
proper mixture of engine coolant
for the cooling system. See
Recommended Fluids and
Lubricants0301.
Never dispose of engine coolant by
putting it in the trash, pouring it on
the ground, or pouring into sewers,
streams, or bodies of water. Have
the coolant changed by an
authorized service center, familiar
with legal requirements regarding
used coolant disposal. This will help
protect the environment and your
health.
Checking Coolant
The vehicle must be on a level
surface when checking the coolant
level.
The engine coolant surge tank and
CAC bottle are in the engine
compartment on the driver side of
the vehicle. See Engine
Compartment Overview 0230.
Check to see if coolant is visible in
the surge tank and CAC bottle.
If the coolant inside the surge tank
is boiling, do not do anything else
until it cools down. If coolant is
visible but the coolant level is not at
or above the mark pointed to on the
surge tank or at the CAC bottle
COLD FILL mark, add a
50/50 mixture of clean, drinkable
water and DEX-COOL coolant.
Be sure the cooling system is cool
before this is done. If no coolant is visible in the coolant
surge tank or CAC bottle, add
coolant as follows:
How to Add Coolant to the
Surge Tank
{Warning
You can be burned if you spill
coolant on hot engine parts.
Coolant contains ethylene glycol
and it will burn if the engine parts
are hot enough. Do not spill
coolant on a hot engine.
Caution
This vehicle has a specific
coolant fill procedure. Failure to
follow this procedure could cause
the engine to overheat and be
severely damaged.

Cadillac XTS Owner Manual (GMNA-Localizing-MidEast-9369806) - 2016 -
crc - 6/24/15
Index 313
Engine (cont'd)Cover . . . . . . . . . . . . . . . . . . . . . . . . . 233
Drive Belt Routing . . . . . . . . . . . . 307
Exhaust . . . . . . . . . . . . . . . . . . . . . . 186
Oil Life System . . . . . . . . . . . . . . . 236
Oil Messages . . . . . . . . . . . . . . . . . 137
Oil Pressure Light . . . . . . . . . . . . 125
Overheated Protection
Operating Mode . . . . . . . . . . . . . 244
Overheating . . . . . . . . . . . . . . . . . . 243
Power Messages . . . . . . . . . . . . . 138
Running While Parked . . . . . . . . 186
Starting . . . . . . . . . . . . . . . . . . . . . . . 182
Entry Lighting . . . . . . . . . . . . . . . . . . . 158
Equipment, Towing . . . . . . . . . . . . . 225
Event Data Recorders . . . . . . . . . . 308
Exit Lighting . . . . . . . . . . . . . . . . . . . . 158
Exterior Lamp Controls . . . . . . . . . 152
Exterior Lamps Off Reminder . . . 154
Exterior Lighting Battery
Saver . . . . . . . . . . . . . . . . . . . . . . . . . 159
F
FeaturesMemory . . . . . . . . . . . . . . . . . . . . . . . . . 12
Filter, Engine Air Cleaner . . . . . . . . . . . 237
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 154
Flashers, Hazard Warning . . . . . . 156 Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . 274
Changing . . . . . . . . . . . . . . . . . . . . . 275
Floor Mats . . . . . . . . . . . . . . . . . . . . . . 294
Fluid Automatic Transmission . . . . . . 237
Brakes . . . . . . . . . . . . . . . . . . . . . . . . 247
Power Steering . . . . . . . . . . . . . . . 244
Washer . . . . . . . . . . . . . . . . . . . . . . . 245
Folding Mirrors . . . . . . . . . . . . . . . . . . 42
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . . . . . . . . 211
Front Automatic Braking (FAB) System . . . . . . . . . . . . . . . . . 213
Front Seats Heated and Ventilated . . . . . . . . . . 57
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
Additives . . . . . . . . . . . . . . . . . . . . . 218
Economy Driving . . . . . . . . . . . . . . . 25
Filling a Portable FuelContainer . . . . . . . . . . . . . . . . . . . 220
Filling the Tank . . . . . . . . . . . . . . . 219
Gauge . . . . . . . . . . . . . . . . . . . . . . . . .115
Low Fuel Warning Light . . . . . . . 126
System Messages . . . . . . . . . . . . 138
Fuses
Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . 254
Fuses and Circuit Breakers . . . 254 Fuses (cont'd)
Instrument Panel Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 257
Rear Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 259
G
GaugesEngine CoolantTemperature . . . . . . . . . . . . . . . . .116
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . .115
Odometer . . . . . . . . . . . . . . . . . . . . . .115
Speedometer . . . . . . . . . . . . . . . . . .114
Tachometer . . . . . . . . . . . . . . . . . . . .115
Trip Odometer . . . . . . . . . . . . . . . . .115
Warning Lights and Indicators . . . . . . . . . . . . . . . . . . . .110
General Information Service and Maintenance . . . . . 296
Towing . . . . . . . . . . . . . . . . . . . . . . . . 221
Vehicle Care . . . . . . . . . . . . . . . . . . 228
Glove Box . . . . . . . . . . . . . . . . . . . . . . . 99
H
Hazard Warning Flashers . . . . . . . 156
Head Restraints . . . . . . . . . . . . . . . . . 50
Head-up Display . . . . . . . . . . . . . . . . 131