2008 PONTIAC G8 fuel type

Gasoline Octane
If your vehicle has a V8 engine, 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 your 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.
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 8-34for 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 4-18.
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.
Driving and Operating 8-33
2008 - Pontiac G8 Owner Manual

The diagnostic system can
determine if the fuel cap has been
left off or improperly installed. This
would allow fuel to evaporate into
the atmosphere. SeeMalfunction
Indicator Lamp on page 4-18.
{CAUTION
If a re starts while you are
refueling, do not remove the
nozzle. Shut off the ow of fuel
by shutting off the pump or by
notifying the station attendant.
Leave the area immediately.
Notice:If you need a new fuel
cap, be sure to get the right type.
Your dealer/retailer can get one for
you. If you get the wrong type, it
may not t properly. This may
cause your malfunction indicator
lamp to light and may damage
your fuel tank and emissions
system. SeeMalfunction Indicator
Lamp on page 4-18.
Filling a Portable Fuel
Container
{CAUTION
Never ll a portable fuel
container while it is in your
vehicle. Static electricity
discharge from the container
can ignite the fuel vapor. You
can be badly burned and your
vehicle damaged if this occurs.
To help avoid injury to you and
others:
Dispense fuel only into
approved containers.
Do not ll a container while it
is inside a vehicle, in a
vehicle’s trunk, pickup bed,
or on any surface other than
the ground.
(Continued)
CAUTION (Continued)
Bring the ll nozzle in
contact with the inside of the
ll opening before operating
the nozzle. Contact should be
maintained until the lling is
complete.
Do not smoke while
pumping fuel.
Do not use a cellular phone
while pumping fuel.
8-36 Driving and Operating
2008 - Pontiac G8 Owner Manual

Vehicle Data
Recording and
Privacy
Your GM vehicle has a number of
sophisticated computers that
record information about the
vehicle’s performance and how it is
driven. For example, your vehicle
uses computer modules to monitor
and control engine and transmission
performance, to monitor the
conditions for airbag deployment
and deploy airbags in a crash and,
if so equipped, to provide antilock
braking to help the driver control the
vehicle. These modules may store
data to help your dealer/retailer
technician service your vehicle.
Some modules may also store data
about how you operate the vehicle,
such as rate of fuel consumption
or average speed. These modules
may also retain the owner’s personal
preferences, such as radio pre-sets,
seat positions, and temperature
settings.
Event Data Recorders
This vehicle has an Event Data
Recorder (EDR). The main purpose
of an EDR is to record, in certain
crash or near crash-like situations,
such as an airbag deployment
or hitting a road obstacle, data that
will assist in understanding how
a vehicle’s systems performed.
The EDR is designed to record data
related to vehicle dynamics and
safety systems for a short period of
time, typically 30 seconds or
less. The EDR in this vehicle is
designed to record such data as:
How various systems in your
vehicle were operating
Whether or not the driver and
passenger safety belts were
buckled/fastened
How far, if at all, the driver was
pressing the accelerator and/or
brake pedal
How fast the vehicle was travelingThis data can help provide a better
understanding of the circumstances
in which crashes and injuries occur.
Important:EDR data is recorded
by your vehicle only if a non-trivial
crash situation occurs; no data
is recorded by the EDR under
normal driving conditions and no
personal data (e.g., name, gender,
age, and crash location) is
recorded. However, other parties,
such as law enforcement, could
combine the EDR data with the type
of personally identifying data
routinely acquired during a crash
investigation.
To read data recorded by an EDR,
special equipment is required,
and access to the vehicle or the
EDR is needed. In addition to
the vehicle manufacturer, other
parties, such as law enforcement,
that have the special equipment, can
read the information if they have
access to the vehicle or the EDR.
12-16 Customer Information
2008 - Pontiac G8 Owner Manual