2008 PONTIAC G8 spark plugs

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.
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.
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.
8-34 Driving and Operating
2008 - Pontiac G8 Owner Manual

Additional Required Services
The following services should be performed at the rst maintenance service (Ior II) after the indicated miles
(kilometers) shown for each item.
Additional Required Services
Service and Miles (Kilometers) 25,000
(40 000) 50,000
(80 000) 75,000
(120 000) 100,000
(160 000) 125,000
(200 000) 150,000
(240 000)
Inspect fuel system for damage or
leaks. • •••••
Inspect exhaust system for loose or
damaged components. • •••••
Replace engine air cleaner lter. See
Engine Air Cleaner/Filter on page 9-11 .•••
Change automatic transmission uid
and lter (severe service).
See footnote (h). •••
Change automatic transmission uid
and lter (normal service). •
Replace spark plugs. An Emission
Control Service. •
Engine cooling system service (or
every ve years, whichever occurs
rst). An Emission Control Service.
See footnote (i). •
11-6 Service and Maintenance
2008 - Pontiac G8 Owner Manual

Maintenance Replacement Parts
Replacement parts identied below by name, part number or specication can be obtained from your dealer/retailer.
Part GM Part Numbers ACDelco Part Numbers
Engine Air Cleaner/Filter 92066873 —
Engine Oil Filter 3.6L V6 25177917 PF2129
6.0L V8 89017524 PF48
Passenger Compartment Air Filter Element 92184248 —
Spark Plugs 3.6L V6 12597464 41–990
6.0L V8 12609877 41–985
Wiper Blades Driver Side 92177917 —
Passenger Side 92177918 —
Service and Maintenance 11-13
2008 - Pontiac G8 Owner Manual