2008 CADILLAC STS fuel additives

Service............................................................5-3
Accessories and Modications..........................5-3
California Proposition 65 Warning.....................5-3
California Perchlorate Materials Requirements.....5-4
Doing Your Own Service Work.........................5-4
Adding Equipment to the Outside
of Your Vehicle...........................................5-4
Fuel................................................................5-5
Gasoline Octane............................................5-5
Gasoline Specications....................................5-6
California Fuel...............................................5-6
Additives.......................................................5-6
Fuels in Foreign Countries...............................5-7
Filling the Tank..............................................5-7
Filling a Portable Fuel Container.......................5-9
Checking Things Under the Hood....................5-10
Hood Release..............................................5-10
Engine Compartment Overview.......................5-11
Engine Oil...................................................5-18
Engine Oil Life System..................................5-21
Engine Air Cleaner/Filter................................5-23
Automatic Transmission Fluid.........................5-25
Engine Coolant.............................................5-25
Coolant Surge Tank Pressure Cap..................5-29
Engine Overheating.......................................5-29
Overheated Engine Protection Operating Mode . . .5-31Cooling System............................................5-32
Power Steering Fluid.....................................5-39
Windshield Washer Fluid................................5-40
Brakes........................................................5-41
Battery........................................................5-44
Jump Starting...............................................5-45
All-Wheel Drive..............................................5-50
Rear Axle.......................................................5-51
Front Axle......................................................5-52
Headlamp Aiming...........................................5-53
Bulb Replacement..........................................5-54
High Intensity Discharge (HID) Lighting............5-54
Halogen Bulbs..............................................5-54
Back-Up Lamps............................................5-54
Replacement Bulbs.......................................5-55
Windshield Replacement.................................5-55
Windshield Wiper Blade Replacement..............5-55
Tires..............................................................5-57
Winter Tires.................................................5-58
Tire Sidewall Labeling...................................5-59
Tire Terminology and Denitions.....................5-62
Run-Flat Tires (STS-V)..................................5-65
Ination - Tire Pressure.................................5-66
High-Speed Operation...................................5-68
Section 5 Service and Appearance Care
5-1

Gasoline Specications
At a minimum, gasoline should meet ASTM specication
D 4814 in the United States or CAN/CGSB-3.5 or 3.511
in Canada. Some gasolines contain an octane-enhancing
additive called methylcyclopentadienyl manganese
tricarbonyl (MMT). We recommend against the use of
gasolines containing MMT. SeeAdditives on page 5-6for
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 might be affected. The malfunction
indicator lamp could turn on and your vehicle might fail
a smog-check test. SeeMalfunction Indicator Lamp
on page 3-68. If this occurs, return to your authorized
dealer/retailer for diagnosis. If it is determined that
the condition is caused by the type of fuel used, repairs
might not be covered by your warranty.
Additives
To provide cleaner air, all gasolines in the United States
are now required to contain additives that help prevent
engine and fuel system deposits from forming, allowing
the emission control system to work properly. In
most cases, you should not have to add anything to the
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/retailer has
additives that will help correct and prevent most
deposit-related problems.
Gasolines containing oxygenates, such as ethers and
ethanol, and reformulated gasolines might be available in
your area. We recommend 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.
5-6

A
Accessories and Modications............................ 5-3
Adaptive Cruise Control...................................3-20
Adding Equipment to Your Airbag-Equipped
Vehicle.......................................................1-65
Additives, Fuel................................................. 5-6
Add-On Electrical Equipment...........................5-116
Air Cleaner/Filter, Engine.................................5-23
Air Conditioning..............................................3-48
Airbag
Passenger Status Indicator...........................3-61
Readiness Light..........................................3-60
Airbag System................................................1-51
What Will You See After an Airbag Inates?....1-58
When Should an Airbag Inate?....................1-56
Where Are the Airbags?...............................1-53
Airbag Systems
Adding Equipment to Your Airbag-Equipped
Vehicle...................................................1-65
How Does an Airbag Restrain?......................1-58
Passenger Sensing System...........................1-60
Servicing Your Airbag-Equipped Vehicle..........1-64
What Makes an Airbag Inate?......................1-57
All-Wheel Drive...............................................5-50
All-Wheel-Drive (AWD) System.........................4-13
Antenna, Backglass.......................................3-124
Antenna, XM™ Satellite Radio Antenna System . . . 3-124
Antilock Brake System (ABS)............................. 4-5
Antilock Brake, System Warning Light................3-65Appearance Care
Aluminum or Chrome-Plated Wheels.............5-112
Care of Safety Belts...................................5-110
Chemical Paint Spotting..............................5-114
Cleaning Exterior Lamps/Lenses..................5-111
Fabric/Carpet............................................5-108
Finish Care...............................................5-111
Finish Damage..........................................5-114
Instrument Panel, Vinyl, and Other
Plastic Surfaces.....................................5-109
Interior Cleaning........................................5-107
Leather....................................................
5-109
Sheet Metal Damage..................................5-113
Speaker Covers.........................................5-110
Tires........................................................5-113
Underbody Maintenance.............................5-114
Vehicle Care/Appearance Materials...............5-115
Washing Your Vehicle.................................5-110
Weatherstrips............................................5-110
Windshield and Wiper Blades......................5-112
Wood Panels............................................5-110
Appointments, Scheduling Service....................... 7-9
Ashtray.........................................................3-47
Audio System.................................................3-98
Audio Steering Wheel Controls....................3-121
Backglass Antenna.....................................3-124
Navigation/Radio System, see
Navigation Manual..................................3-117
Radio Personalization.................................3-117
Radio Reception........................................3-123
1

Engine (cont.)
Enhanced StabiliTrak®....................................... 4-9
Entry Lighting.................................................3-41
Event Data Recorders.....................................7-16
Extender, Safety Belt.......................................1-27
Exterior Lighting Battery Saver..........................3-40
F
Filter
Engine Air Cleaner......................................5-23
Finish Damage.............................................5-114
Flashers, Hazard Warning.................................. 3-6
Flash-to-Pass.................................................3-13
Flat Tire........................................................5-86
Flat Tire, Changing.........................................5-96
Flat Tire, Storing...........................................5-104
Fluid.............................................................5-25
Power Steering...........................................5-39
Windshield Washer......................................5-40
Fog Lamp
Fog ...........................................................3-39
Fog Lamp Light..............................................3-72
Forward Collision Alert (FAC) System................3-10
Front Axle......................................................5-52
Fuel............................................................... 5-5
Additives...................................................... 5-6
California Fuel.............................................. 5-6Fuel (cont.)
Filling a Portable Fuel Container..................... 5-9
Filling the Tank............................................. 5-7
Fuels in Foreign Countries.............................. 5-7
Gage.........................................................3-73
Gasoline Octane........................................... 5-5
Gasoline Specications.................................. 5-6
Fuses
Fuses and Circuit Breakers.........................5-117
Rear Underseat Fuse Block.........................5-121
Underhood Fuse Block...............................5-118
Windshield Wiper.......................................5-117
G
Gage
Engine Coolant Temperature.........................3-67
Fuel..........................................................3-73
Speedometer..............................................3-59
Tachometer.................................................3-59
Garage Door Opener.......................................2-51
Gasoline
Octane........................................................ 5-5
Specications............................................... 5-6
Glove Box.....................................................2-58
GM Mobility Reimbursement Program.................. 7-6
5