1996 Oldsmobile Cutlass Supreme check engine

Use regular unleaded gasoline rated at 87 octane or
higher. At a minimum, it should meet specifications
ASTM D4814 in the United States and CGSB 3.5-M93
in Canada. Improved gasoline specifications have been
developed by the American Automobile Manufacturers
Association (AAMA) for better vehicle performance
and engine protection. Gasolines meeting the AAMA
-specification could provide improved driveability and
emission control system protection compared to
other gasolines.
Be sure the posted octane is at least 87. If the octane is
less than 87, you may get a heavy knocking noise when
you drive.
If it’s bad enough, it can damage your engine.
If you’re using fuel rated at 87 octane or higher and you
still hear heavy knocking, your engine needs service. But
don’t worry
if you hear a little pinging noise when you’re
accelerating or driving up a hill. That’s normal, and you d\
on’t
have to buy a higher octane fuel to get rid of pinging. It’\
s the
heavy, constant knock that means you have a problem. If your vehicle
is certified to meet California Emission
Standards .(indicated on the underhood tune-up label), it
is designed to .operate on fuels that meet California
specifications. If such fuels are not available in states
adopting .California emissions standards, your vehicle
will operate satisfactorily on fuels meeting federal
specifications, but emission control system performance
may be affected. The malfunction indicator lamp on
your instrument panel may turn on and/or your vehicle
may fail a smog-check test. If this occurs, return
to your authorized Oldsmobile retailer for diagnosis
to determine the cause of failure. In the event it is
determined that the cause of the condition is the type of
fuels used, repairs may not be covered by your warranty.
In Canada, some gasolines contain an octane-enhancing
additive called MMT. If you use such fuels, your
emission control system performance may deteriorate
and the malfunction indicator lamp on your instrument
panel may turn on. If this happens, return to your authorized Oldsmobile dealer for service.

To provide cleaner air, all gasolines are now required to
contain additives that will help prevent deposits from
forming in your engine and fuel system, allowing your
emission control system to function properly. Therefore,
you should not have to add anything to the fuel. In
addition, gasolines containing oxygenates, such as
ethers and ethanol, and reformulated gasolines may
be available in your area to help clean the air. General
Motors recommends that you use these gasolines if they
comply with the specifications described earlier.
NOTICE: ~~
Your vehicle was not designed for fuel that
contains methanol. Don’t use it. It can corrode
metal parts in your fuel system and also damage
plastic and rubber parts. That damage wouldn’t
be covered under your warranty.
Fuels in Foreign Countries
If you plan on driving in another country outside the
United States or Canada, the proper fuel may be hard
to find. Never use leaded gasoline
or any other fuel not
recommended in the previous text on fuel. Costly repairs
caused by use of improper fuel wouldn’t be covered by
your warranty.
To check on fuel availability, ask an auto club, or
contact a major oil company that does business in the
country where you’ll be driving.
You can also write us at the following address for
advice. Just tell us where you’re going and give your
Vehicle Identification Number (VIN).
General Motors Overseas Distribution Corporation,
North American Export Sales (NAES)
1908 Colonel Sam Drive
Oshawa, Ontario
L1H 8P7
6-4

Checking Things Under the Hood Hood Release
A CAUTION:
I
I
An electric fan under the hood can start up and
injure you even when the engine
is not running.
Keep hands, clothing and tools away from any
underhood electric fan.
Things that burn can get on hot engine parts and
start
a fire. These include liquids like gasoline,
oil, coolant, brake fluid, windshield washer and
other fluids, and plastic or rubber. You or others
could be burned. Be careful not to drop
or spill
things that
will burn onto a hot engine.
To open the hood, first
pull the handle inside
the vehicle.
Then
go to the front of the
vehicle and release the
secondary hood release.
Lift the hood.
6-7

it Fiy.
Engine Oil
Before closing the hood, be sure all the filler caps are
on properly. Then just pull the hood down and close
LOW OIL
LEVEL
,If the LOW OIL LEVEL
light on the instrument
panel comes on, it means
you need to check your
engine oil level right away.
For more information, see
“Low Oil Level Light” in the
Index. You should check your engine oil level regularly;
this is an added reminder.
It’s a good idea to check your engine oil after you get
fuel. In order to get an accurate reading, the oil must be
hot and the vehicle must
be on level ground.
i
3.1L L82 Engine 3.4L LQ1 Engine
The engine oil dipstick handle is- the yellow loop near
the front
of the engine.
6-10

Turn off the engine and give the oil 20 minutes to drain
back into the oil pan. If
you don’t, the oil dipstick might
not show the actual level.
3.1 L L82 Engine 3.4L LQ 1 Engine
Checking Engine Oil
Pull out 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 Oil
If the oil ist at or below the lower mark, then you’ll need
to add some oil. But you must use the right kind. This
part explains what kind of oil, to use.
For crankcase
capacity, see “Capacities and Specifications” in
the Index.
1
I NOTICE:
Don’t add too much oil. If your engine has so
much oil that the oil level gets above the
cross-hatched area’that shows the proper
operating range, your engine could be damaged.
*
6-11

I
Operating the.engine wi4.h the air cleaner oi’fcan
cause you or .others to be burned. The
air cleaner
not only cleans the
air, it stops flame if the engine
backfires. Hit isn’t there, and the engine
backfires, you could
be burned. Don’t drive with
it off, and be careful working on the engine with
the
air cleaner off.
NOTICE:
If the air cleaner is off, a backfii can cause a
damaging engine fire. And, dirt can easily get
into
your engine, which will damage it. Always
have the
air cleaner in place when you’re driving.
-1 -. .. ..
Automatk Transaxle’ Fluid
When to Check and Change
A good time to check your automaticdransaxle fiui,d
level is when the engine
oil is changed.
Change both the fluid and. filter ,every
30,000 miles
(83 000 km) if the, vehicle is mainly ‘driven under one or
more of these conditions:
’
In heavy city traffic where the outside temperature
regularly reaches
90 OF (32 O C) or higher;.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in :taxi, polide or delivery service. ,.,
If you do not use your vehicle under any of these
conditions, the fluid and filter
.. do not require changing.
See “Scheduled Maintenance Services” in the Index.
I

How to Check
Because this operation can be a little difficult, you may
choose to have this done at your Oldsmobile retail
facility Service Department.:
If you do it yourself, be sure to follow all the instructions
here, or you could get a false reading on the dipstick.
NOTICE:
Too much or too little'fluid can damage your
transaxle.
Too much can mean that some of the
fluid. could come out and fall on hot engine parts
or exhaust system parts, starting' a fire. Be sure to
get an accurate reading
if ,you check your
transaxle fluid.
Wait at least 30 minutes before checking the transaxle
fluid level if you have been driving:
0 When outside temperatures, are above 90°F (32°C).
At high speed for quite a while.
0 In heavy traffic -- especially in hot weather.
0 While pulling a trailer.
To get the right reading, the fluid should be at normal
operating temperature,' which is
..I 80°F to 200°F 1
(82°C to 93°C).
Get the vehicle warmed up by driving about 15 miles
. (24 km) when outside temperatures are above 50°F
(10OC). If it's colder than 50°F (lO"C), you may
have to drive longer.
Checking the Fluid Level
0
0
'0
0
Park your vehicle on a level place. Keep the
engine running.
With the pqking brake applied, place the shift lever
in PARK (P).
With your foot on the brake pedal, move the shift
lever through each gear range, pausing for about
three seconds in each range. Then, position the shift
.
lever in PARK (P).
Let the. engine run at 'idle for three to five minutes.
6-18

Then, without shutting off the
m
en-@ne, follow these steps: , .
I
c
.. ., x., ' ,
3.1L L82 Engine 3.4L LQ1 Engine - '.
3. Check both sides of the dipstick, and read the
lower level. The. fluid level
myst be in the.
. cross-hatched area.
' 4. If the fluid level is in the ameptable range, push
..
the dipstick back in all the way.
:. '
!
;:
4