2009 CADILLAC CTS fuel additives

Service............................................................5-3
Accessories and Modications..........................5-3
California Proposition 65 Warning.....................5-4
California Perchlorate Materials Requirements.....5-4
Doing Your Own Service Work.........................5-4
Adding Equipment to the Outside of the
Vehicle......................................................5-5
Fuel................................................................5-5
Gasoline Octane............................................5-6
Gasoline Specications....................................5-6
California Fuel...............................................5-7
Additives.......................................................5-7
Fuels in Foreign Countries...............................5-8
Filling the Tank..............................................5-8
Filling a Portable Fuel Container.....................5-11
Checking Things Under the Hood....................5-12
Hood Release..............................................5-12
Engine Compartment Overview.......................5-14
Engine Oil...................................................5-18
Engine Oil Life System..................................5-21
Engine Cover...............................................5-23
Engine Air Cleaner/Filter................................5-25
Automatic Transmission Fluid.........................5-29
Manual Transmission Fluid.............................5-29
Hydraulic Clutch...........................................5-30
Cooling System............................................5-31
Engine Coolant.............................................5-32Coolant Surge Tank Pressure Cap..................5-37
Engine Overheating.......................................5-37
Overheated Engine Protection
Operating Mode.........................................5-39
Power Steering Fluid.....................................5-40
Windshield Washer Fluid................................5-41
Brakes........................................................5-42
Battery........................................................5-45
Jump Starting...............................................5-46
All-Wheel Drive..............................................5-51
Rear Axle.......................................................5-52
Headlamp Aiming...........................................5-53
Bulb Replacement..........................................5-57
High Intensity Discharge (HID) Lighting............5-57
Halogen Bulbs..............................................5-57
Front Turn Signal and Fog Lamps...................5-58
License Plate Lamp......................................5-59
Replacement Bulbs.......................................5-59
Windshield Wiper Blade Replacement..............5-59
Tires..............................................................5-61
Winter Tires.................................................5-62
Tire Sidewall Labeling...................................5-63
Tire Terminology and Denitions.....................5-66
Ination - Tire Pressure.................................5-69
High-Speed Operation...................................5-70
Tire Pressure Monitor System.........................5-71
Section 5 Service and Appearance Care
5-1

Gasoline Octane
If the vehicle has the 3.6L V6 engine (VIN Code V), use
regular unleaded gasoline with a posted octane rating of
87 or higher. If the octane rating is less than 87, you
might notice an audible knocking noise when you drive,
commonly referred to as spark knock. If this occurs, use a
gasoline rated at 87 octane or higher as soon as possible.
If you are using gasoline rated at 87 octane or higher and
you hear heavy knocking, the engine needs service.
If the vehicle has the 3.6L V6 engine (VIN Code 7), use
regular unleaded gasoline with a posted octane rating of
87 or higher. For best performance or trailer towing, you
could choose to use middle grade 89 octane unleaded
gasoline. If the octane rating is less than 87, you might
notice an audible knocking noise when you drive,
commonly referred to as spark knock. If this occurs, use a
gasoline rated at 87 octane or higher as soon as possible.
If you are using gasoline rated at 87 octane or higher and
you hear heavy knocking, the engine needs service.If the vehicle has the 6.2L supercharged V8 engine
(VIN Code P), 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 might also hear audible spark knock
during acceleration. Rell the tank with premium fuel as
soon as possible to avoid damaging the engine. If you are
using gasoline rated at 91 octane or higher and you hear
heavy knocking, the engine needs service.
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 5-7
for additional information.
5-6

California Fuel
If the 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, the 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 the
vehicle might fail a smog-check test. SeeMalfunction
Indicator Lamp on page 3-43. 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 the vehicle 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 the vehicle experiences
problems due to dirty injectors or valves, look for gasolinethat 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:This 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 the
vehicle warranty.
Some gasolines that are not reformulated for low
emissions can contain an octane-enhancing additive
called methylcyclopentadienyl manganese tricarbonyl
(MMT); ask the attendant where you buy gasoline
whether the fuel contains MMT. We recommend against
the use of such gasolines. Fuels containing MMT can
reduce the life of spark plugs and the performance of
the emission control system could be affected. The
malfunction indicator lamp might turn on. If this occurs,
return to your dealer/retailer for service.
5-7

A
Accessories and Modications............................ 5-3
Accessory Power Outlets.................................3-22
Adaptive Forward Lighting System.....................3-19
Adding Equipment to Your Airbag-Equipped
Vehicle.......................................................1-73
Additives, Fuel................................................. 5-7
Add-On Electrical Equipment...........................5-114
Air Cleaner/Filter, Engine.................................5-25
Air Conditioning..............................................3-24
Airbag
Passenger Status Indicator...........................3-37
Readiness Light..........................................3-36
Airbag System................................................1-58
Adding Equipment to Your Airbag-Equipped
Vehicle...................................................1-73
How Does an Airbag Restrain?......................1-65
Passenger Sensing System...........................1-67
Servicing Your Airbag-Equipped Vehicle..........1-72
What Makes an Airbag Inate?......................1-65
What Will You See After an Airbag Inates?....1-66
When Should an Airbag Inate?....................1-63
Where Are the Airbags?...............................1-61
All-Wheel Drive...............................................5-51
All-Wheel-Drive (AWD) System........................... 4-9
Analog Clock..................................................3-23Antenna, Backglass.......................................3-128
Antenna, XM™ Satellite Radio Antenna
System.....................................................3-128
Antilock Brake System (ABS)............................. 4-4
Antilock Brake, System Warning Light................3-40
Appearance Care
Aluminum or Chrome-Plated Wheels.............5-112
Care of Safety Belts...................................5-109
Chemical Paint Spotting..............................5-113
Cleaning Exterior Lamps/Lenses..................5-110
Fabric/Carpet............................................5-107
Finish Care...............................................5-110
Finish Damage..........................................5-113
Instrument Panel, Vinyl, and Other
Plastic Surfaces.....................................5-108
Interior Cleaning........................................5-106
Leather....................................................5-108
Sheet Metal Damage..................................5-113
Speaker Covers.........................................5-109
Tires........................................................5-113
Underbody Maintenance.............................5-113
Washing Your Vehicle.................................5-110
Weatherstrips............................................5-109
Windshield and Wiper Blades......................5-111
Wood Panels............................................5-109
Appointments, Scheduling Service.....................7-10
Ashtray.........................................................3-23
1

Engine
Air Cleaner/Filter.........................................5-25
Check and Service Engine Soon Lamp...........3-43
Coolant......................................................5-32
Coolant Heater............................................2-35
Coolant Temperature Gage...........................3-42
Coolant Temperature Warning Light................3-41
Cover........................................................5-23
Drive Belt Routing.......................................6-17
Engine Compartment Overview......................5-14
Exhaust.....................................................2-50
Oil .............................................................5-18
Oil Life System...........................................5-21
Oil Pressure Gage.......................................3-47
Overheated Protection Operating Mode...........5-39
Overheating................................................5-37
Speed Limiter.............................................3-34
Starting......................................................2-33
Entry Lighting.................................................3-20
Event Data Recorders.....................................7-17
Extender, Safety Belt.......................................1-33
Exterior Lighting Battery Saver..........................3-20
F
Filter
Engine Air Cleaner......................................5-25
Finish Damage.............................................5-113
Flashers, Hazard Warning.................................. 3-6Flash-to-Pass................................................... 3-9
Flat Tire........................................................5-85
Flat Tire, Changing.........................................5-96
Flat Tire, Storing...........................................5-104
Fluid
Automatic Transmission................................5-29
Power Steering...........................................5-40
Windshield Washer......................................5-41
Fog Lamp
Fog ...........................................................3-19
Fog Lamp Light..............................................3-48
Folding Rear Seat...........................................1-13
Fuel............................................................... 5-5
Additives...................................................... 5-7
California Fuel.............................................. 5-7
Filling a Portable Fuel Container....................5-11
Filling the Tank............................................. 5-8
Fuels in Foreign Countries.............................. 5-8
Gage .........................................................3-49
Gasoline Octane........................................... 5-6
Gasoline Specications.................................. 5-6
Fuses
Fuses and Circuit Breakers.........................5-115
Rear Compartment Fuse Block..........5-122, 5-124
Underhood Fuse Block......................5-115, 5-119
Windshield Wiper.......................................5-115
5