2007 CADILLAC XLR fuel additives

Service........................................................ 363
Accessories and Modications................... 363
California Proposition 65 Warning.............. 364
Doing Your Own Service Work.................. 364
Adding Equipment to the Outside of Your
Vehicle................................................... 365
Fuel............................................................. 365
Gasoline Octane........................................ 366
Gasoline Specications.............................. 366
California Fuel........................................... 367
Additives................................................... 367
Fuels in Foreign Countries........................ 368
Filling the Tank......................................... 369
Filling a Portable Fuel Container............... 371
Checking Things Under the Hood.............. 372
Hood Release........................................... 373
Engine Compartment Overview.................. 374
Engine Oil................................................. 377
Engine Oil Life System.............................. 380
Supercharger Oil....................................... 382
Engine Air Cleaner/Filter............................ 382
Automatic Transmission Fluid.................... 384
Engine Coolant.......................................... 385
Coolant Surge Tank Pressure Cap.............. 388Engine Overheating................................... 388
Overheated Engine Protection
Operating Mode..................................... 390
Cooling System......................................... 391
Power Steering Fluid ................................. 396
Windshield Washer Fluid........................... 397
Brakes...................................................... 399
Battery...................................................... 402
Jump Starting............................................ 403
Rear Axle.................................................... 407
Headlamp Aiming........................................ 408
Headlamp Vertical Aiming.......................... 410
Bulb Replacement....................................... 412
Windshield Replacement............................ 412
Windshield Wiper Blade Replacement....... 412
Tires............................................................ 413
Winter Tires (XLR-V) ................................. 414
Tire Sidewall Labeling............................... 415
Tire Terminology and Denitions............... 417
Run-Flat Tires........................................... 420
Ination - Tire Pressure............................. 422
Tire Pressure Monitor System................... 423
Tire Inspection and Rotation...................... 426
Section 6 Service and Appearance Care
361

Gasoline Octane
If your vehicle has the 4.6L V8 engine (VIN
Code A), use premium unleaded gasoline with a
posted octane rating of 91 or higher. You may also
use regular unleaded gasoline rated at 87
octane or higher, but your vehicle’s acceleration
may be slightly reduced, and you may notice
a slight audible knocking noise, commonly referred
to as spark knock. If the octane is less than 87,
you may notice a heavy knocking noise when you
drive. If this occurs, use a gasoline rated at 87
octane or higher as soon as possible. Otherwise,
you might damage your engine. If you are
using gasoline rated at 87 octane or higher and
you hear heavy knocking, your engine needs
service.
If your vehicle has the 4.4L V8 engine (VIN
Code D), use premium unleaded gasoline with a
posted octane rating of 91 or higher. For best
performance, use premium unleaded gasoline with
a posted octane rating of 93. In an emergency,you can use regular unleaded gasoline with an
octane rating of 87 or higher. If 87 octane fuel is
used, do not perform any aggressive driving
maneuvers such as wide open throttle applications.
You may also hear audible spark knock during
acceleration. Rell your tank with premium fuel as
soon as possible to avoid damaging your
engine. If you are using gasoline rated at 91
octane or higher and you hear heavy knocking,
your engine needs service.
Gasoline Specications
At a minimum, gasoline should meet ASTM
specication D 4814 in the United States or
CAN/CGSB-3.5 in Canada. Some gasolines may
contain an octane-enhancing additive called
methylcyclopentadienyl manganese tricarbonyl
(MMT). General Motors recommends against the
use of gasolines containing MMT. SeeAdditives
on page 367for additional information.
366

California Fuel
If your vehicle is certied to meet California
Emissions Standards, it is designed to operate on
fuels that meet California specications. See
the underhood emission control label. If this fuel is
not available in states adopting California
emissions standards, your vehicle will operate
satisfactorily on fuels meeting federal
specications, but emission control system
performance may be affected. The malfunction
indicator lamp may turn on and your vehicle may
fail a smog-check test. SeeMalfunction Indicator
Lamp on page 196. If this occurs, return to
your authorized GM dealer for diagnosis. If it is
determined that the condition is caused by the type
of fuel used, repairs may not be covered by
your warranty.
Additives
To provide cleaner air, all gasolines in the United
States are now required to contain additives
that will help prevent engine and fuel system
deposits from forming, allowing your emission
control system to work properly. In most cases,
you should not have to add anything to your fuel.
However, some gasolines contain only the
minimum amount of additive required to meet U.S.
Environmental Protection Agency regulations.
To help keep fuel injectors and intake valves clean,
or if your vehicle experiences problems due to
dirty injectors or valves, look for gasoline that is
advertised as TOP TIER Detergent Gasoline. Also,
your dealer has additives that will help correct
and prevent most deposit-related problems.
367

A
Accessories and Modications..................... 363
Accessory Power Outlet(s).......................... 177
Adaptive Cruise Control............................... 150
Adaptive Forward Lighting System............... 167
Adding Equipment to Your Airbag-Equipped
Vehicle....................................................... 59
Additives, Fuel............................................ 367
Add-On Electrical Equipment....................... 452
Air Cleaner/Filter, Engine............................. 382
Air Conditioning........................................... 178
Airbag
Passenger Status Indicator....................... 189
Readiness Light....................................... 188
Airbag Sensing and Diagnostic
Module (SDM).......................................... 491
Airbag System............................................... 44
Adding Equipment to Your
Airbag-Equipped Vehicle......................... 59
How Does an Airbag Restrain?.................. 51
Passenger Sensing System....................... 53
Servicing Your Airbag-Equipped Vehicle..... 58
What Makes an Airbag Inate?.................. 51
What Will You See After an Airbag
Inates?................................................. 52Airbag System (cont.)
When Should an Airbag Inate?................. 49
Where Are the Airbags?............................. 47
Antenna, Diversity Antenna System............. 230
Antenna, XM™ Satellite Radio Antenna
System.................................................... 230
Anti-Lock Brake System (ABS).................... 327
Anti-Lock Brake, System Warning Light....... 193
Appearance Care
Aluminum or Chrome-Plated Wheels........ 448
Care of Safety Belts................................ 445
Chemical Paint Spotting........................... 450
Cleaning Exterior Lamps/Lenses.............. 446
Cleaning the Inside of Your Vehicle.......... 441
Fabric/Carpet........................................... 443
Finish Care.............................................. 447
Finish Damage......................................... 449
Instrument Panel, Vinyl, and Other
Plastic Surfaces.................................... 444
Leather.................................................... 444
Sheet Metal Damage............................... 449
Speaker Covers....................................... 445
Tires........................................................ 449
Underbody Maintenance........................... 449
Vehicle Care/Appearance Materials.......... 450
Washing Your Vehicle .............................. 446
499

Fuel............................................................ 365
Additives.................................................. 367
California Fuel.......................................... 367
Filling a Portable Fuel Container.............. 371
Filling Your Tank...................................... 369
Fuels in Foreign Countries....................... 368
Gage....................................................... 202
Gasoline Octane...................................... 366
Gasoline Specications............................ 366
Fuses
Fuses and Circuit Breakers...................... 453
Instrument Panel Fuse Block................... 453
Underhood Fuse Block............................. 455
Windshield Wiper..................................... 452
G
Gage
Engine Coolant Temperature.................... 195
Engine Oil Pressure................................. 200
Fuel......................................................... 202
Speedometer........................................... 187
Tachometer.............................................. 187
Voltmeter Gage........................................ 192
Garage Door Opener..........................110, 111Gasoline
Octane..................................................... 366
Specications........................................... 366
Getting Started
Getting Started, Navigation....................... 234
Global Positioning System (GPS)................ 281
Glove Box................................................... 121
GM Mobility Reimbursement Program.......... 486
H
Hazard Warning Flashers............................ 140
Headlamp
Aiming..................................................... 408
Vertical Aiming......................................... 410
Headlamps
Adaptive Forward Lighting System........... 167
Bulb Replacement.................................... 412
Daytime Running Lamps.......................... 166
Flash-to-Pass........................................... 143
High/Low Beam Changer ......................... 143
On Reminder........................................... 166
Washer.................................................... 146
Wiper Activated........................................ 166
Head-Up Display (HUD).............................. 171
504