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What Kind of Oil to Use
Oils recommended for your vehicle can be identified by
looking for the “Starburst” symbol. This symbol
indicates that the oil has been certified by the American
Petroleum Institute (API).
Do not use any oil which
does not carry this Starburst symbol.
If you change your own
oil, be sure you use oil that
has the Starburst symbol on the front
of the oil
container. If you have
your
oil changed for you,
be sure the oil put into
your engine
is American
Petroleum Institute certified
for gasoline en~es.
I I U v
You should also use the proper viscosity oil for your
vehicle, as shown
in the following chart:
RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS
FOR BEST FUEL ECONOMY AND COLD STARTING, SELECT THE LOWEST
SAE VISCOSITY GRADE OIL
FOR THE EXPECTED TEMPERATURE RANGE.
HOT
WEATHER
’m)
LOOK
FOR MIS
SYMBOL
+loo- - +38
+EO- - +27
+60- - +16
+40- - +4
+20---7
0---18
I- --I SAE 1OW-30
SAE 5W-30 PREFERRED
/
caul
WEATHER
DO NOT USE SAE 2OW-50 OR ANY OTHER GRADE OIL NOT RECOMMENDED
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Page 249 of 387

As shown in the chart, SAE 5W-30 is best for your
vehicle. However, you can use SAE
1OW-30 if it’s going
to be 0°F (-1 8 “C) or above. These numbers on an oil
container
show its viscosity, or thickness. Do not use
other viscosity oils, such
as SAE 20W-50.
NOTICE:
Use only engine oil with the American Petroleum
Institute Certified For Gasoline Engines
“Starburst”
symbol. Failure to use the
recommended oil can result in engine damage
not covered by your warranty.
GM Goodwrench@ oil meets all the requirements for
your vehicle.
Engine Oil Additives
Don’t add anything to your oil. Your Geo dealer is ready
to advise if
you think something should‘be added.
When to Change Engine Oil
See if any one of these is true for you:
0
e
e
0
e
Most trips are less than 5 to 10 miles (8 to 16 km).
This is particularly important when outside
temperatures are below freezing.
Most trips include extensive idling (such as frequent
driving in stop-and-go traffic).
You operate your vehicle in dusty areas or
off-road frequently.
You frequently tow a trailer or use a carrier on top of
your vehicle.
The vehicle is used for delivery service, police, taxi
or other commercial application.
Driving under these conditions causes engine
oil to
break down sooner.
If any one of these is true for your
vehicle, then you need to change your
oil and filter
every
3,000 miles (5 000 km) or 3 months -- whichever
occurs first.
If none of them is true, change oil and filter every
7,500 miles (12 500 km) or 7.5 months -- whichever
occurs first.
Driving a vehicle with a fully warned
engine under highway conditions causes engine oil to
break down slower.
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Part D: Recommended Fluids and
Lubricants
NOTE: Fluids and lubricants identified below by name,
part number or specification may be obtained from your
GM dealer.
USAGE
Engine Oil
Engine Coolant
FLUIDlLUBRICANT
Engine oil with the American
Petroleum Institute Certified For
Gasoline Engines “Starburst”
symbol
of the proper viscosity. To
determine the preferred viscosity
for your vehicle’s engine, see
“Engine Oil” in the Index.
50/50 mixture of clean water
(preferably distilled) and good
quality ethylene glycol base
antifreeze
(GM Part No. 1052753
or equivalent) conforming to GM
Specification 1825M
or approved
recycled coolant conforming
to
GM Specification 1825M. See
“Engine Coolant” in
the Index.
USAGE
Hydraulic Brake
System
Parking Brake
Cable Guides
Power Steering
System
Manual
Transmission
(All) and
Transfer Case
(4-Wheel-Drive)
~
Automatic
Transmission
Key Lock
Cylinders
FLUIDlLUBRICANT
Delco Supreme 11 @ Brake Fluid
(GM Part
No. 1052535 or
equivalent DOT-3 brake fluid).
Chassis lubricant (GM Part
No. 1052497 or equivalent) or
lubricant meeting requirements
of NLGI Grade 2, Category’ LB
or GC-LB.
DEXR0N’-I11 Automatic
Transmission Fluid.
GM Goodwrench Synthetic
Manual Transmission Gear Oil
(GM Part No. 12346190 - 1 qt.),
Castrol Syntorq@
LT or equivalent
SAE 75W-90 GL-4 gear oil.
DEXRON@-I11 Automatic
Transmission Fluid.
Multi-F‘urpose Lubricant, Superlube@
(GM Part No. 12346241
or equivalent).
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