2008 PONTIAC G8 check oil

Engine Compartment Overview
When you open the hood, this is what you will see:A. Engine Compartment Fuse
Block. See Engine Compartment
Fuse Block on page 9-35 .
B. Coolant Reservoir and Dipstick. See Cooling System on
page 9-17 .
C. Engine Oil Fill Cap. See “When to Add Engine Oil” under Engine
Oil on page 9-8 .
D. Engine Oil Dipstick (Out of View). See “Checking Engine Oil” under
Engine Oil on page 9-8 .
E. Brake Master Cylinder Reservoir. See “Brake Fluid” under Brakes
on page 9-24 .
F. Power Steering Reservoir. See Power Steering Fluid on
page 9-21 .
G. Engine Air Cleaner/Filter. See Engine Air Cleaner/Filter
on page 9-11 .
H. Windshield Washer Fluid Reservoir. See Windshield
Washer Fluid on page 9-22 .
I. Radiator Pressure Cap. See Cooling System on page 9-17 .
V6 Engine
9-6 Vehicle Service and Care
2008 - Pontiac G8 Owner Manual

A. Engine Compartment FuseBlock. See Engine Compartment
Fuse Block on page 9-35 .
B. Coolant Reservoir and Dipstick. See Cooling System on
page 9-17 .
C. Engine Oil Dipstick. See “Checking Engine Oil” under
Engine Oil on page 9-8 .
D. Engine Oil Fill Cap. See “When to Add Oil” under Engine Oil on
page 9-8 .
E. Power Steering Reservoir. See Power Steering Fluid on
page 9-21 .
F. Brake Master Cylinder Reservoir. See “Brake Fluid” under Brakes
on page 9-24 .
G. Engine Air Cleaner/Filter. See Engine Air Cleaner/Filter on
page 9-11 .
H. Windshield Washer Fluid Reservoir. See Windshield
Washer Fluid on page 9-22 .
I. Radiator Pressure Cap. See Cooling System on page 9-17 .
V8 Engine
Vehicle Service and Care 9-7
2008 - Pontiac G8 Owner Manual

Engine Oil
Checking Engine Oil
It is a good idea to check the
engine oil every time you get fuel.
In order to get an accurate reading,
the oil must be warm and the
vehicle must be on level ground.
The engine oil dipstick handle
is a yellow loop. SeeEngine
Compartment Overview on page 9-6
for the location of the engine oil
dipstick.
1. Turn off the engine and give the
oil several minutes to drain back
into the oil pan. If you do not
do this, the oil dipstick might not
show the actual level.
2. Pull the dipstick and clean it with
a paper towel or cloth, then push
it back in all the way. Remove
it again, keeping the tip down and
check the level.
When to Add Engine Oil
If the oil is below the MIN (minimum)
mark, add at least one quart/liter
of the recommended oil. This
section explains what kind of oil to
use. For engine oil crankcase
capacity, seeCapacities and
Specifications on page 10-2.
Notice:Do not add too much oil.
If the engine has so much oil
that the oil level gets above the
upper mark that shows the proper
operating range, the engine
could be damaged.SeeEngine Compartment Overview
on page 9-6for the location of
the engine oil ll cap.
Be sure to add enough oil to put the
level somewhere in the proper
operating range. Push the dipstick
all the way back in when you
are through.
9-8 Vehicle Service and Care
2008 - Pontiac G8 Owner Manual

If you are in an area of extreme
cold, where the temperature
falls below−20°F (−29°C), it is
recommended that you use either
an SAE 5W-30 synthetic oil or
an SAE 0W-30 oil. Both provide
easier cold starting and better
protection for the engine at
extremely low temperatures.
Engine Oil Additives
Do not add anything to the oil. The
recommended oils with the
starburst symbol that meet GM
Standard GM6094M are all
you need for good performance and
engine protection.
Engine Oil Life System
When to Change Engine Oil
Your vehicle has a computer system
that lets you know when to change
the engine oil and lter. This is based
on engine revolutions and engine
temperature, and not on mileage.
Based on driving conditions, themileage at which an oil change will
be indicated can vary considerably.
For the oil life system to work
properly, you must reset the system
every time the oil is changed.
When the system has calculated that
oil life has been diminished, it will
indicate that an oil change is
necessary. The Service Engine Oil
message will be displayed. Change
the oil as soon as possible within the
next 600 miles (1 000 km). It is
possible that, if you are driving under
the best conditions, the oil life system
might not indicate that an oil change
is necessary for over a year.
However, the engine oil and lter
must be changed at least once a
year and at this time the system must
be reset. Your dealer/retailer has
trained service people who will
perform this work using genuine
parts and reset the system. It is also
important to check the oil regularly
and keep it at the proper level.If the system is ever reset
accidentally, you must change the
oil at 3,000 miles (5 000 km)
since your last oil change.
Remember to reset the oil life
system whenever the oil is changed.
How to Reset the Engine Oil
Life System
The Engine Oil Life System
calculates when to change the
engine oil and lter based on vehicle
use. Whenever the oil is changed,
reset the system so it can calculate
when the next oil change is
required. If a situation occurs where
you change the oil prior to the
Service Engine Oil message being
displayed, reset the system.
9-10 Vehicle Service and Care
2008 - Pontiac G8 Owner Manual

Notice:If the air cleaner/lter is
off, a backre can cause a
damaging engine re. And, dirt
can easily get into your engine,
which will damage it. Always have
the air cleaner/lter in place
when you are driving.
Automatic Transmission
Fluid
It is not necessary to check the
transmission uid level. A
transmission uid leak is the only
reason for uid loss. If a leak occurs,
take your vehicle to a dealer/retailer
and have it repaired as soon as
possible.
Change the uid and lter at the
intervals listed in the Maintenance
Schedule. SeeScheduled
Maintenance on page 11-4. Be sure
to use the transmission uid
listed inRecommended Fluids and
Lubricants on page 11-12.Notice:Use of the incorrect
automatic transmission uid may
damage your vehicle, and the
damages may not be covered by
your warranty. Always use the
automatic transmission uid
listed inRecommended Fluids
and Lubricants on page 11-12.
Engine Coolant
The cooling system in your vehicle is
lled with DEX-COOL®engine
coolant. This coolant is designed to
remain in your vehicle for ve years
or 150,000 miles (240 000 km),
whichever occurs rst, if you add
only DEX-COOL
®extended life
coolant.
The following explains your cooling
system and how to add coolant
when it is low. If you have a problem
with engine overheating, see
Engine Overheating on page 9-16.A 50/50 mixture of clean, drinkable
water and DEX-COOL
®coolant will:
Give freezing protection down
to−34°F (−37°C).
Give boiling protection up to
265°F (129°C).
Protect against rust and
corrosion.
Help keep the proper engine
temperature.
Let the warning lights and gages
work as they should.
Notice:Using coolant other than
DEX-COOL
®can cause premature
engine, heater core, or radiator
corrosion. In addition, the engine
coolant may require changing
sooner, at the rst maintenance
service after each 30,000 miles
(50 000 km) or 24 months,
whichever occurs rst. Any
repairs would not be covered by
the vehicle warranty. Always
use DEX-COOL
®(silicate-free)
coolant in the vehicle.
Vehicle Service and Care 9-13
2008 - Pontiac G8 Owner Manual

What to Use
Use a mixture of one-half clean,
drinkable water and one-half
DEX-COOL
®coolant which will not
damage aluminum parts. If you
use this coolant mixture, you do not
need to add anything else.
{CAUTION
Adding only plain water to the
cooling system can be
dangerous. Plain water, or
some other liquid such as
alcohol, can boil before the
proper coolant mixture will.
(Continued)
CAUTION (Continued)
The vehicle’s coolant warning
system is set for the proper
coolant mixture. With plain
water or the wrong mixture, the
engine could get too hot but
would not get the overheat
warning. The engine could
catch re and you or others
could be burned. Use a 50/50
mixture of clean, drinkable
water and DEX-COOL
®coolant.
Notice:If an improper coolant
mixture is used, the engine could
overheat and be badly damaged.
The repair cost would not be
covered by the vehicle warranty.
Too much water in the mixture
can freeze and crack the engine,
radiator, heater core, and
other parts.If you have to add coolant more
than four times a year, have
your dealer/retailer check your
cooling system.
Notice:If you use extra
inhibitors and/or additives in your
vehicle’s cooling system, you
could damage your vehicle. Use
only the proper mixture of the
engine coolant listed in this
manual for the cooling system.
SeeRecommended Fluids
and Lubricants on page 11-12for
more information.
9-14 Vehicle Service and Care
2008 - Pontiac G8 Owner Manual

{CAUTION
Heater and radiator hoses, and
other engine parts, can be very
hot. Do not touch them. If you
do, you can be burned.
Do not run the engine if there is
a leak. If you run the engine, it
could lose all coolant. That
could cause an engine re, and
you could be burned. Get any
leak xed before you drive the
vehicle.
If there seems to be no leak, with the
engine on, check to see if the electric
engine cooling fans are running.
If the engine is overheating, both
fans should be running. If they are
not, your vehicle needs service.
Notice:Engine damage from
running the engine without
coolant is not covered by the
warranty.Notice:Using coolant other than
DEX-COOL
®can cause premature
engine, heater core, or radiator
corrosion. In addition, the engine
coolant could require changing
sooner, at 30,000 miles
(50 000 km) or 24 months,
whichever occurs rst. Any
repairs would not be covered by
the vehicle warranty. Always
use DEX-COOL
®(silicate-free)
coolant in the vehicle.
How to Add Coolant to the
Cooling System
Notice:This vehicle has a
specic coolant ll procedure.
Failure to follow this procedure
could cause the engine to
overheat and be severely
damaged.If no coolant is visible in the coolant
reservoir, add coolant as follows:
{CAUTION
Adding only plain water to the
cooling system can be
dangerous. Plain water, or
some other liquid such as
alcohol, can boil before the
proper coolant mixture will.
The vehicle’s coolant warning
system is set for the proper
coolant mixture. With plain
water or the wrong mixture, the
engine could get too hot but
you would not get the overheat
warning. The engine could
catch re and you or others
could be burned. Use a 50/50
mixture of clean, drinkable
water and DEX-COOL
®coolant.
Vehicle Service and Care 9-19
2008 - Pontiac G8 Owner Manual

When You Are Ready to Leave
After Parking on a Hill
1. Apply your regular brakes and
hold the pedal down while you:
Start your engine.
Shift into a gear.
Release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is
clear of the chocks.
4. Stop and have someone pick up
and store the chocks.
Maintenance When Trailer
Towing
Your vehicle will need service more
often when you’re pulling a trailer.
See the Maintenance Schedule for
more on this. Things that are
especially important in trailer
operation are automatic transmission
uid (don’t overll), engine oil, drivebelt, cooling system and brake
system. Each of these is covered in
this manual, and the Index will help
you nd them quickly. If you’re
trailering, it’s a good idea to review
this information before you start
your trip.
Check periodically to see that all
hitch nuts and bolts are tight.
Engine Cooling When Trailer
Towing
Your cooling system may
temporarily overheat during severe
operating conditions. SeeEngine
Overheating on page 9-16.
Appearance Care
Interior Cleaning
Your vehicle’s interior will continue
to look its best if it is cleaned
often. Although not always visible,
dust and dirt can accumulate
on your upholstery. Dirt can damage
carpet, fabric, leather, and plastic
surfaces. Regular vacuuming
is recommended to remove particles
from the upholstery. It is important
to keep your upholstery from
becoming and remaining heavily
soiled. Soils should be removed as
quickly as possible. Your vehicle’s
interior may experience extremes of
heat that could cause stains to
set rapidly.
Lighter colored interiors may require
more frequent cleaning. Use care
because newspapers and garments
that transfer color to your home
furnishings may also transfer color
to your vehicle’s interior.
Vehicle Service and Care 9-91
2008 - Pontiac G8 Owner Manual