2007 CADILLAC STS fuel additives

Service........................................................ 362
Accessories and Modications................... 363
California Proposition 65 Warning.............. 363
Doing Your Own Service Work.................. 364
Adding Equipment to the Outside of Your
Vehicle................................................... 365
Fuel............................................................. 365
Gasoline Octane........................................ 365
Gasoline Specications.............................. 366
California Fuel........................................... 366
Additives................................................... 367
Fuels in Foreign Countries........................ 368
Filling the Tank......................................... 368
Filling a Portable Fuel Container............... 371
Checking Things Under the Hood.............. 372
Hood Release........................................... 372
Engine Compartment Overview.................. 373
Engine Oil................................................. 380
Engine Oil Life System.............................. 383
Supercharger Oil....................................... 385
Engine Air Cleaner/Filter............................ 386
Automatic Transmission Fluid.................... 388Engine Coolant.......................................... 389
Coolant Surge Tank Pressure Cap............ 393
Engine Overheating................................... 393
Overheated Engine Protection
Operating Mode..................................... 395
Cooling System......................................... 396
Power Steering Fluid ................................. 403
Windshield Washer Fluid........................... 404
Brakes...................................................... 405
Battery...................................................... 408
Jump Starting............................................ 408
All-Wheel Drive........................................... 414
Rear Axle.................................................... 416
Front Axle................................................... 417
Bulb Replacement....................................... 417
High Intensity Discharge (HID) Lighting..... 418
Halogen Bulbs........................................... 418
Back-Up Lamps......................................... 418
Replacement Bulbs................................... 419
Windshield Replacement............................ 419
Windshield Wiper Blade Replacement....... 419
Section 5 Service and Appearance Care
359

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.
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.
366

The malfunction indicator lamp may turn on and
your vehicle may fail a smog-check test. See
Malfunction Indicator Lamp on page 252. 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.Gasolines containing oxygenates, such as ethers
and ethanol, and reformulated gasolines may
be available in your area. General Motors
recommends that you use these gasolines if they
comply with the specications described earlier.
However, E85 (85% ethanol) and other fuels
containing more than 10% ethanol must not be
used in vehicles that were not designed for
those fuels.
Notice:Your vehicle was not designed for
fuel that contains methanol. 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 your warranty.
Some gasolines that are not reformulated for low
emissions may contain an octane-enhancing
additive called methylcyclopentadienyl manganese
tricarbonyl (MMT); ask the attendant where you
buy gasoline whether the fuel contains MMT.
General Motors recommends against the use of
such gasolines. Fuels containing MMT can reduce
the life of spark plugs and the performance of
the emission control system may be affected. The
malfunction indicator lamp may turn on. If this
occurs, return to your dealer for service.
367

A
Accessories and Modications..................... 363
Accessory Power Outlet(s).......................... 228
Adaptive Cruise Control............................... 197
Adding Equipment to Your Airbag-Equipped
Vehicle....................................................... 79
Additives, Fuel............................................ 367
Add-On Electrical Equipment....................... 486
Air Cleaner/Filter, Engine............................. 386
Air Conditioning........................................... 230
Airbag
Passenger Status Indicator....................... 245
Readiness Light....................................... 244
Airbag Sensing and Diagnostic
Module (SDM).......................................... 536
Airbag System............................................... 64
Adding Equipment to Your
Airbag-Equipped Vehicle......................... 79
How Does an Airbag Restrain?.................. 72
Passenger Sensing System....................... 74
Servicing Your Airbag-Equipped Vehicle..... 78
What Makes an Airbag Inate?.................. 71
What Will You See After an Airbag
Inates?................................................. 72
When Should an Airbag Inate?................. 70Airbag System (cont.)
Where Are the Airbags?............................. 66
All-Wheel Drive........................................... 414
All-Wheel-Drive (AWD) System.................... 327
Antenna, Diversity Antenna System............. 314
Antenna, XM™ Satellite Radio Antenna
System.................................................... 314
Anti-Lock Brake System (ABS).................... 321
Anti-Lock Brake, System Warning Light....... 249
Appearance Care
Aluminum or Chrome-Plated Wheels........ 482
Care of Safety Belts................................ 479
Chemical Paint Spotting........................... 484
Cleaning Exterior Lamps/Lenses.............. 480
Cleaning the Inside of Your Vehicle.......... 476
Fabric/Carpet........................................... 477
Finish Care.............................................. 481
Finish Damage......................................... 483
Instrument Panel, Vinyl, and Other Plastic
Surfaces............................................... 479
Leather.................................................... 478
Sheet Metal Damage............................... 483
Speaker Covers....................................... 479
Tires........................................................ 483
Underbody Maintenance........................... 483
545

F
Filter
Engine Air Cleaner................................... 386
Finish Damage............................................ 483
Flashers, Hazard Warning........................... 180
Flash-to-Pass.............................................. 188
Flat Tire...................................................... 451
Flat Tire, Changing...................................... 464
Flat Tire, Storing......................................... 473
Fluid
Automatic Transmission............................ 388
Power Steering........................................ 403
Windshield Washer.................................. 404
Fog Lamp Light........................................... 256
Fog Lamps.................................................. 217
Forward Collision Alert (FAC) System.......... 184
Front Axle................................................... 417
Fuel............................................................ 365
Additives.................................................. 367
California Fuel.......................................... 366
Filling a Portable Fuel Container.............. 371
Filling Your Tank...................................... 368
Fuels in Foreign Countries....................... 368
Gage....................................................... 257
Gasoline Octane...................................... 365
Gasoline Specications............................ 366Fuses
Fuses and Circuit Breakers...................... 487
Rear Underseat Fuse Block..................... 492
Underhood Fuse Block............................. 488
Windshield Wiper..................................... 486
G
Gage
Engine Coolant Temperature.................... 251
Fuel......................................................... 257
Speedometer........................................... 243
Tachometer.............................................. 243
Garage Door Opener..........................135, 136
Gasoline
Octane..................................................... 365
Specications........................................... 366
Glove Box................................................... 146
GM Mobility Reimbursement Program.......... 530
H
Hazard Warning Flashers............................ 180
Head Restraints............................................ 13
Headlamp Wiring......................................... 486
550