2018 CADILLAC CT6 fuel additives

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
206 DRIVING AND OPERATING
Lane DepartureWarning (LDW) . . . . . . . . . . . . . . . . . 270
Lane Keep Assist (LKA) . . . . . . . . . . 271
Surround Vision Recorder . . . . . . . 272
Charging
Plug-In Charging (PLUG-IN Only) . . . . . . . . . . . . . . . . . 274
Delayed Charging Override (PLUG-IN Only) . . . . . . . . . . . . . . . . . 275
Charging Status Feedback (PLUG-IN Only) . . . . . . . . . . . . . . . . . 275
Charge Cord (PLUG-IN Only) . . . . 279
Utility Interruption of Charging (PLUG-IN Only) . . . . . . . . . . . . . . . . . 284
Electrical Requirements for Battery Charging
(PLUG-IN Only) . . . . . . . . . . . . . . . . . 285
Fuel
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
California Fuel Requirements . . . . 287
Fuels in Foreign Countries . . . . . . . 287
Fuel Additives . . . . . . . . . . . . . . . . . . . . 287
Filling the Tank . . . . . . . . . . . . . . . . . . 288
Filling a Portable Fuel
Container . . . . . . . . . . . . . . . . . . . . . . . . 290
Trailer Towing
General Towing Information . . . . 290
Driving Characteristics andTowing Tips . . . . . . . . . . . . . . . . . . . . . 290 Trailer Towing
(PLUG-IN Only) . . . . . . . . . . . . . . . . . 293
Trailer Towing (Gasoline Only) . . . . . . . . . . . . . . . . . 293
Towing Equipment . . . . . . . . . . . . . . . 294
Conversions and Add-Ons
Add-On Electrical Equipment . . . 295
Driving Information
Distracted Driving
Distraction comes in many forms and
can take your focus from the task of
driving. Exercise good judgment and
do not let other activities divert your
attention away from the road. Many
local governments have enacted laws
regarding driver distraction. Become
familiar with the local laws in
your area.
To avoid distracted driving, keep your
eyes on the road, keep your hands on
the steering wheel, and focus your
attention on driving.
. Do not use a phone in demanding
driving situations. Use a
hands-free method to place or
receive necessary phone calls.
. Watch the road. Do not read, take
notes, or look up information on
phones or other electronic devices.
. Designate a front seat passenger
to handle potential distractions.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
DRIVING AND OPERATING 287
by the vehicle warranty. If heavy
knocking is heard when using gasoline
rated at 93 octane, the engine needs
service.
Prohibited Fuels
Caution
Do not use fuels with any of the
following conditions; doing so may
damage the vehicle and void its
warranty:. For vehicles which are not
FlexFuel, fuel labeled greater
than 15% ethanol by volume,
such as mid-level ethanol
blends (16 –50% ethanol),
E85, or FlexFuel.
. Fuel with any amount of
methanol, methylal, and
aniline. These fuels can
corrode metal fuel system
parts or damage plastic and
rubber parts.
. Fuel containing metals such
as methylcyclopentadienyl
manganese tricarbonyl
(Continued)
Caution (Continued)
(MMT), which can damage
the emissions control system
and spark plugs.
. Fuel with a posted octane
rating of less than the
recommended fuel. Using this
fuel will lower fuel economy
and performance, and may
decrease the life of the
emissions catalyst.
California Fuel
Requirements
If the vehicle is certified to meet
California Emissions Standards, it is
designed to operate on fuels that meet
California specifications. See the
underhood emission control label.
If this fuel is not available in states
adopting California Emissions
Standards, the vehicle will operate
satisfactorily on fuels meeting federal
specifications, but emission control
system performance may be affected.
The malfunction indicator lamp could
turn on and the vehicle may not pass a smog-check test. See
Malfunction
Indicator Lamp (Check Engine Light)
0 143. If this occurs, return to your
authorized dealer for diagnosis. If it is
determined that the condition is
caused by the type of fuel used,
repairs may not be covered by the
vehicle warranty.
Fuels in Foreign Countries
The U.S., Canada, and Mexico post
fuel octane ratings in anti-knock index
(AKI). For fuel not to use in a foreign
country, see “Prohibited Fuels” inFuel
0 286.
Fuel Additives
To keep fuel systems clean, TOP TIER
detergent gasoline is recommended.
See Fuel 0286.
If TOP TIER detergent gasoline is not
available, one bottle of GM Fuel
System Treatment Cleaner added to
the fuel tank at every engine oil
change, can help. GM Fuel System
Treatment Cleaner is the only gasoline
additive recommended by General
Motors. It is available at your dealer.

Cadillac CT6 Owner Manual (GMNA-Localizing-U.S./Canada-11292458) -
2018 - crc - 2/14/17
436 INDEX
Frequency StatementRadio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 417
Front Pedestrian Braking (FPB) System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
Front Seats Heated and Ventilated . . . . . . . . . . . . . 72
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
Additives . . . . . . . . . . . . . . . . . . . . . . . . . . 287
Economy Driving . . . . . . . . . . . . . . . . . . . 32
Filling a Portable FuelContainer . . . . . . . . . . . . . . . . . . . . . . . . 290
Filling the Tank . . . . . . . . . . . . . . . . . . . 288
Foreign Countries . . . . . . . . . . . . . . . . . 287
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Low Fuel Warning Light . . . . . . . . . 150
Requirements, California . . . . . . . . . 287
Fuses Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332
Fuses and Circuit Breakers . . . . . . . 331
Instrument Panel Fuse Block . . . . 335
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
G
Garage Door Opener . . . . . . . . . . . . . . . . 179Programming . . . . . . . . . . . . . . . . . . . . . . 179
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . . . 328 Gauges
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Boost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Engine Coolant Temperature . . . . 139
Engine Oil Pressure . . . . . . . . . . . . . . . 137
Engine Oil Temperature . . . . . . . . . . 138
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Power Indicator . . . . . . . . . . . . . . . . . . . 136
Speedometer . . . . . . . . . . . . . . . . . . . . . . 134
Tachometer . . . . . . . . . . . . . . . . . . . . . . . 134
Trip Odometer . . . . . . . . . . . . . . . . . . . . 134
Voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Warning Lights and
Indicators . . . . . . . . . . . . . . . . . . . . . . . . 126
General Information
Service and Maintenance . . . . . . . . 388
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290
Vehicle Care . . . . . . . . . . . . . . . . . . . . . . . 297
Glove Box . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
H
Hazard Warning Flashers . . . . . . . . . . 186
Head Restraints . . . . . . . . . . . . . . . . . . . . . . 65
Head-up Display . . . . . . . . . . . . . . . . . . . . 165
Headlamps Aiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . 185
Bulb Replacement . . . . . . . . . . . . . . . . 330 Headlamps (cont'd)
Daytime Running
Lamps (DRL) . . . . . . . . . . . . . . . . . . . . 185
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . 185
High-Beam On Light . . . . . . . . . . . . . . 151
High/Low Beam Changer . . . . . . . . . 185
Lamps On Reminder . . . . . . . . . . . . . . 151
Heated Steering Wheel . . . . . . . . . . . . . . . . . . . . 119
Heated and Ventilated Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Heated and Ventilated Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . 55
Heater
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
Heating . . . . . . . . . . . . . . . . . . . . . . . . .191, 197
High Voltage Battery Gauge . . . . . . . 135
High-Beam On Light . . . . . . . . . . . . . . . . 151
High-Speed Operation . . . . . . . . . . . . . . 349
Hill and Mountain Roads . . . . . . . . . . 211
Hill Start Assist (HSA) . . . . . . . . . . . . . 237
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
How to Wear Seat Belts Properly . . . 79
HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . .191, 197