2007 CHEVROLET COBALT fuel additives

Service........................................................ 280
Accessories and Modications................... 280
California Proposition 65 Warning.............. 281
Doing Your Own Service Work.................. 281
Adding Equipment to the Outside of
Your Vehicle.......................................... 282
Fuel............................................................. 282
Gasoline Octane........................................ 283
Gasoline Specications.............................. 283
California Fuel........................................... 283
Additives................................................... 284
Fuels in Foreign Countries........................ 284
Filling the Tank......................................... 285
Filling a Portable Fuel Container............... 287
Checking Things Under the Hood.............. 288
Hood Release........................................... 289
Engine Compartment Overview.................. 290
Engine Oil................................................. 293
Engine Oil Life System.............................. 298
Engine Air Cleaner/Filter............................ 300
Automatic Transaxle Fluid......................... 301
Manual Transaxle Fluid............................. 301Hydraulic Clutch........................................ 302
Engine Coolant.......................................... 302
Coolant Surge Tank Pressure Cap............ 309
Engine Overheating................................... 309
Cooling System......................................... 311
Windshield Washer Fluid........................... 317
Brakes...................................................... 318
Battery...................................................... 321
Jump Starting............................................ 322
Headlamp Aiming........................................ 328
Bulb Replacement....................................... 331
Halogen Bulbs........................................... 331
Headlamps, Front Turn Signal,
Sidemarker, and Parking Lamps............. 331
Center High-Mounted Stoplamp (CHMSL) ... 333
Taillamps and Turn Signal
Lamps (Coupe)...................................... 334
Taillamps, Turn Signal, Stoplamps and
Back-up Lamps (Sedan)......................... 334
Back-Up Lamps (Coupe)........................... 335
License Plate Lamp................................... 336
Replacement Bulbs................................... 337
Section 5 Service and Appearance Care
277

Gasoline Octane
If your vehicle has the 2.2L L4 engine (VIN Code F),
use regular unleaded gasoline with a posted octane
rating of 87 or higher. If the octane rating is less
than 87, you may 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, your engine needs service.
If your vehicle has the 2.4L L4 engine (VIN Code B)
or the 2.0L Supercharged engine (VIN Code P),
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.
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 284for 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. The
malfunction indicator lamp may turn on and your
vehicle may fail a smog-check test. SeeMalfunction
Indicator Lamp on page 174. 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.
283

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.
Fuels in Foreign Countries
If you plan on driving in another country outside the
United States or Canada, the proper fuel might be
hard to nd. Never use leaded gasoline or any other
fuel not recommended in the previous text on fuel.
Costly repairs caused by use of improper fuel would
not be covered by your warranty.
To check the fuel availability, ask an auto club, or
contact a major oil company that does business
in the country where you will be driving.
284

A
Accessories and Modications..................... 280
Adding Equipment to Your
Airbag-Equipped Vehicle............................ 83
Additives, Fuel............................................ 284
Add-On Electrical Equipment....................... 383
Air Cleaner/Filter, Engine............................. 300
Air Conditioning........................................... 158
Airbag
Passenger Status Indicator....................... 168
Readiness Light....................................... 167
Airbag System............................................... 68
What Will You See After an Airbag
Inates?................................................. 76
When Should an Airbag Inate?................. 73
Where Are the Airbags?............................. 71
Airbag Systems
Adding Equipment to Your
Airbag-Equipped Vehicle......................... 83
How Does an Airbag Restrain?.................. 75
Passenger Sensing System....................... 77
Servicing Your Airbag-Equipped Vehicle..... 82
What Makes an Airbag Inate?.................. 75
Antenna, Fixed Mast................................... 224Antenna, XM™ Satellite Radio
Antenna System....................................... 224
Anti-Lock Brake System.............................. 231
Anti-Lock Brake, System Warning Light....... 172
Appearance Care
Aluminum or Chrome-Plated Wheels........ 378
Care of Safety Belts................................ 376
Chemical Paint Spotting........................... 381
Cleaning Exterior Lamps/Lenses.............. 377
Cleaning the Inside of Your Vehicle.......... 373
Fabric/Carpet........................................... 374
Finish Care.............................................. 377
Finish Damage......................................... 380
Instrument Panel, Vinyl, and
Other Plastic Surfaces.......................... 376
Leather.................................................... 375
Sheet Metal Damage............................... 380
Tires........................................................ 379
Underbody Maintenance........................... 380
Vehicle Care/Appearance Materials.......... 381
Washing Your Vehicle.............................. 377
Weatherstrips........................................... 376
Windshield and Wiper Blades................... 378
Ashtray....................................................... 157
435

F
Filter
Engine Air Cleaner................................... 300
Finish Damage............................................ 380
Fixed Mast Antenna.................................... 224
Flashers, Hazard Warning........................... 144
Flash-to-Pass.............................................. 146
Flat Tire...................................................... 358
Flat Tire, Changing...................................... 358
Flat Tire, Storing......................................... 369
Fluid
Manual Transaxle..................................... 301
Windshield Washer.................................. 317
Fog Lamp
Fog .......................................................... 154
Fog Lamp Light........................................... 179
Folding Rear Seat......................................... 16
Fuel............................................................ 282
Additives.................................................. 284
California Fuel.......................................... 283
Filling a Portable Fuel Container.............. 287
Filling Your Tank...................................... 285Fuel (cont.)
Fuels in Foreign Countries....................... 284
Gage....................................................... 179
Gasoline Octane...................................... 283
Gasoline Specications............................ 283
Fuses
Engine Compartment Fuse Block............. 386
Floor Console Fuse Block........................ 384
Fuses and Circuit Breakers...................... 384
Windshield Wiper..................................... 383
G
Gage
Boost....................................................... 180
Fuel......................................................... 179
Speedometer........................................... 166
Tachometer.............................................. 166
Gasoline
Octane..................................................... 283
Specications........................................... 283
Glove Box................................................... 136
GM Mobility Reimbursement Program.......... 419
440