recommended oil CHEVROLET CORVETTE 1994 4.G Owners Manual

Downloaded from www.Manualslib.com manuals search engine Features and Controls
Zharging System Light
rhis light will come on when you turn on
he ignition, but the engine is not running
LS a check to show you it is working. It
ihould go out when the engine starts. If
t stays on or comes on while you are
Iriving, you may have a problem with
he electrical charging system. It could
ndicate that you have a loose or broken
lrive belt or another electrical problem.
3ave it checked right away. Driving whil
his light is
on could drain your battery.
:f you must drive a short distance with thl
ight on, be certain to turn
off all your
tccessories, such as the radio and air
:onditioner.
loor Ajar Light
’his light comes on when you open one
If the doors with the ignition on. It stays
In until you fully close the door. Have
‘our vehicle serviced if the light comes
In and stays on even when the doors are
ully closed.
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1
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1
Sngine Oil Life Monitor
?he “CHANGE OIL” light comes on for
, few seconds when you turn the ignition
In. It will come on and stay on when it’s
ime to change your oil.
:he monitor uses oil temperature and
rngine revolutions to decide when the oil
s nearly worn out. The light is only a
eminder, though. You should change
‘our oil at the intervals recommended in
‘our Maintenance Schedule, even if the
‘CHANGE
OIL” light hasn’t come on.
3e sure to reset the monitor when your oil
s changed, even if the “CHANGE OIL”
ight didn’t come on. If you don’t reset
he monitor, it won’t work correctly.
Tollow these steps:
... 94

Downloaded from www.Manualslib.com manuals search engine begin to check traffic. Try to determine
where you expect to blend with the flow.
Try to merge into the gap
at close to the
prevailing speed. Switch on your turn
signal, check your mirrors and glance
over your shoulder as often as necessary.
Try to blend smoothly with the traffic
flow.
Once you are on the freeway, adjust your
speed to the posted limit or to the
prevailing rate if it’s slower. Stay in the
right lane unless you want to pass.
Before changing lanes, check your
mirrors. Then use your turn signal. Just
before you leave the lane, glance quickly
over your shoulder to make sure there
isn’t another vehicle in your “blind” spot.
Once you are moving on the freeway,
make certain you allow a reasonable
following distance. Expect to move
slightly slower at night.
When you want to leave the freeway,
move to the proper lane well
in advance.
If you miss your exit do not, under any
circumstances, stop and back up. Drive on
to the next exit.
The exit ramp can be curved, sometimes
quite sharply. The exit speed is usually
posted. Reduce your speed according to your speedometer, not
to your sense of
motion. After driving for any distance at
higher speeds, you may tend to think you
are going slower than you actually are.
Before Leaving on a Long Trip
Make sure you’re ready. Try to be well
rested. If you must start when you’re not
fresh
- such as after a day’s work -
don’t plan to ,make too many miles that
first part
of the journey. Wear comfortable
clothing and shoes you can easily drive
in.
Is your vehicle ready for a long trip? If
you keep it serviced and maintained, it’s
ready to go. If it needs service, have it
done before starting out. Of course, you’ll
find experienced and able service experts
in Chevrolet dealerships all across North
America. They’ll be ready and willing to
help if you need
it.
Here are some things you can check
before a trip:
Windshield Washer Fluid: Is the
reservoir full? Are all windows clean
inside and outside?
0 Wiper Blades: Are they in good
shape?
0
0
Fuel, Engine Oil, Other Fluids:
Have you checked all levels?
Lights: Are they all working? Are the
lenses clean?
Tires: They are vitally important to a
safe, trouble-free trip.
Is the wead
good enough for long-distance
driving? Are the tires all inflated to
the recommended pressure?
Weather Forecasts: What’s the
weather outlook along your route?
Should you delay your trip
a short
time to avoid a major storm system?
Maps: Do you have up-to-date maps?
Highway Hypnosis
Is there actually such a condition as
“highway hypnosis”? Or is it jugt plain
falling asleep at the wheel? Call it
highway hypnosis, lack of awareness, or
whatever.
There is something about an easy stretch
of road with the same scenery, along with
the hum of the tires on the road, the drone
of the engine, and the rush of the wind
against the vehicle that can make you
sleepy. Don’t let it happen to you! If it
does, your vehicle can leave the road in
less than a second, and you could crash
and be injured.
135

Downloaded from www.Manualslib.com manuals search engine Service and Appearance Care
I
NOTICE:
If you use oils that don’t have the
GM4718M Standard designation,
you can cause engine damage not
covered by your warranty.
0 SAE 5W-30
As shown in the viscosity chart,
SAE 5W-30 is best for your
vehicle. However, you can use
SAE 1OW-30 if it’s going to be
0°F (-18°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.
. .I80
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
/
WEATHER
r
COLD
WOK FOR
LABELS
ONE OFTHESE @
1
-r
SAEZ-30
PREFERRED
Oils meeting these requirements should
also have either one or both of these
symbols
on the container.
You should look for these
on the oil
container, and use
o& those oils that
are identified as meeting GM Standard
4718M and have either the “starburst”
symbol or the
API doughnut symbol
with either the
SH or the SG designation.
Your Corvette engine is filled at the
factory with a Mobil
l@ synthetic oil,
which meets all requirements for your
vehicle.

Downloaded from www.Manualslib.com manuals search engine To protect the convertible top:
0 After you wash the vehicle, make sure
the top is completely dry before you
lower it.
0 Don’t get any cleaner on the vehicle’s
painted finish; it could leave streaks.
0 If you decide to go through an
automatic car wash, ask the manager
if the equipment could damage your
top.
Cleaning and Storage of Your Hardtop
The optional hardtop has the same
durable finish as the painted surfaces
of
your Corvette. You can wash, polish and
wax it.
If you store the hardtop for a long time,
keep it covered in a dry place. Apply
silicone grease to all the weatherstrips.
Sngine Cleaning
Jse care when cleaning the LT5 engine.
10 not direct water into the “V” area on
he engine between the cylinder heads.
NOTICE:
I
Don’t use a cleaner with a strong
alkaline base. It will discolor the
aluminum.
4luminum Wheels
Your aluminum wheels have a protective
zoating similar to the painted surface of
your vehicle. Don’t use strong soaps,
shemicals, chrome polish,
or other
abrasive cleaners on them because you
could damage this coating. After rinsing
thoroughly, a wax may be applied.
I NOTICE:
I
Don’t use an automatic car wash that
has hard silicon carbide cleaning
brushes. These brushes can take
off
the protective coating.
rires
Your Chevrolet dealer has a GM White
Sidewall Tire Cleaner. You can
use a stiff
)rush with the cleaner.
When applying a tire dressing always take
;are to wipe
off any overspray or splash
from painted surfaces. Petroleum-based
products may damage the paint finish.
Weatherstrips
Silicone grease on weatherstrips will
make them last longer, seal better, and not
stick or squeak. Apply silicone grease
with a clean cloth at least every
six
months. During very eold, damp weather
more frequent application may be
required. (See “Recommended Fluids and
Lubricants’’ in the Index.)
Foreign Material
Calcium chloride and other salts, ice
melting agents, road oil and tar, tree sap,
bird droppings, chemicals from industrial
chimneys, and other foreign matter can
damage your vehicle’s finish if they
remain on painted surfaces. Use cleaners
that are marked safe for painted surfaces
to remove foreign matter.
215 ...

Downloaded from www.Manualslib.com manuals search engine IMPORTANT:
KEEP THE ENGINE OIL
AT THE PROPER
LEVEL AND CHANGE AS
RECOMMENDED
This part covers the
maintenance required for your
Corvette
. Your vehicle needs
these services to retain its
safety. dependability and
emission control performance
.
.
Maintenance Schedule
Section
Introduction: A Word about Maintenance ........................ 230
A .
B .
C .
D .
E .
Your Vehicle and the Environment ......................... 230
How This Part Is Organized ............................... 230
Scheduled Maintenance Services ............................ 231
Using Your Maintenance Schedule
......................... 231
Selecting the Right Schedule
.............................. 231
Schedule1
............................................. 232
Schedule11
............................................ 234
Explanation
of Scheduled Maintenance Services .............. 236
Owner Checks and Services ................................ 238
At Each Fuel
Fill ....................................... 238
AtLeastOnceaMonth
.................................. 238
At Least Once
a Year .................................... 239
Periodic Maintenance Inspections ........................... 242
Recommended Fluids and Lubricants ........................ 244
Maintenance Record ...................................... 247
I
Protection
Plan
Have you purchased the GM Protection Plan? The Plan
supplements your new car warranties
.
See your GM dealer for details .
229 ...

Downloaded from www.Manualslib.com manuals search engine Maintenance Schedule
Section A: Scheduled Maintenance Services (Cont.)
Schedule I
Follow Schedule I if your vehicle is
MAINLY driven under one or more of
the following conditions:
0 When most trips are less than 4 miles
(6 km).
When most trips are less than 10 miles
(16 km) and outside temperatures
remain below freezing.
0 When most trips include extended idling and/or frequent low-speed
operation, as in stop-and-go traffic.
0 When operating in dusty areas.
Schedule
I should also be followed if the
vehicle
is used for delivery service. police,
taxi or other commercial applications.
* An Emission Control Service.
t The U.S. Environmental Protection Agency
or the California Air Resources Board has
determined that the failure to perform this
maintenance item will not nullify the emission warranty or limit recall liability prior to the
completion
of vehicle usefil life. General
Motors, however, urges that all recommended
maintenance services be performed at the
indicated intervals and the maintenance be
recorded in “Section E: Maintenance Record.”
WHAT TO SERVICE
See “Explanation of Scheduled
Schedules
I and II.
ITEM NO. Maintenance Services” following
WHEN TO PERFORM
Miles (kilometers) or Months
(whichever occurs first).
I I
1 I Engine Oil and Filter Change* 1 Every 3,000 miles (5 000 km) or 3 months.
2 I Chassis Lubrication I Every other oil change.
3
Cooling System Service” 4
Engine Adkessory Drive Belt Inspection
Every 30,000 miles (50 000 km) or 24 months.
5 I Transmission Service I
See “Explanation of Scheduled Maintenance
Services” following Schedules
I and 11.
6
7
Every 100,000 miles (166 000 km).
Spark Plug Replacement*
Every
30,000 miles (50 000 km).
Spark flug Wire Inspection*?
8 I Air Cleaner Filter Replacement* I
See “Explanation of Scheduled Maintenance
Services” following Schedules
I and 11.
9 I Fuel Tank, Cap and Lines Inspection*t Every 30,000 miles (50 000 km).
. . .232

Downloaded from www.Manualslib.com manuals search engine Maintenance Schedule
Section A: Scheduled Maintenance Services (Cont.)
Schedule /I
Follow Schedule I1 ONLY if none of
the driving conditions specified in
Schedule
I apply.
* An Emission Control Service.
t The US. Environmental Protection Agency
or the California Air Resources Board has
determined that the failure to perform this
maintenance item will not nullify the emission
warranty or limit recall liability prior to the
completion
of vehicle useful life. General
Motors, however, urges that all recommended
maintenance services be performed at the
indicated intervals and the maintenance be
recorded in “Section E: Maintenance Record.”
. . ,234
ITEM NO.
2
3
4
5
6
-
-
7
8
-
9 -
WHAT TO SERVICE
See “Explanation of Scheduled
Maintenance Services” following
Schedules
I and II.
WHEN TO PERFORM
Miles (kilometers) or Months
(whichever occursfirst).
Engine Oil Change* Every 7,500 miles (12 500 km) or 12 months.
Oil Filter Change* At fist and every other oil change.
Chassis Lubrication Every
7,500 miles (12 500 krn) or 12 months.
Engine Accessory Drive Belt Inspection
Cooling Svstem Service* Every
30,000 miles (50 000 km) or 24 months.
Transmission Service
I
See “Explanation of Scheduled Maintenance
Services” following Schedules
I and 11.
Spark Plug Replacement* Every 100,000 miles (166 000 km).
Spark Plug Wire
Inspection*t Every 30,000 miles (50 000 km).
Air Cleaner Filter Replacement* I
See
“Explanation of Scheduled Maintenance
Services” following Schedules
I and 11.
Fuel Tank, Cap and Lines Inspection*t I Every 30,000 miles (50 000 km).

Downloaded from www.Manualslib.com manuals search engine ITEM
NO. SERVICE
Index. This provides proper
freeze and boil protection,
corrosion inhibitor level and
maintains proper engine
operating temperature.
Inspect hoses and replace if
they are cracked, swollen or
deteriorated. Tighten screw-type
hose clamps. Clean the outside of
the radiator and air conditioning
condenser. Wash the pressure cap
and neck.
To help ensure proper operation,
we recommend a pressure test of
both the cooling system and the
pressure cap.
5 Transmission Service - For
manual transmissions, fluid
doesn’t require changing. See
“Periodic Maintenance
Inspection.”
For automatic transmissions,
change both the fluid and filter
every
15,000 miles (25 000 km)
ITEM
NO. SERVICE
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.
Uses such as found in taxi,
police car or delivery service.
If you do not use your vehicle
under any of these conditions,
change both
the fluid and
filter every
100,000 miles
(1 66 000 km).
Replace spark plugs with the
proper type. See “Replacement
Parts” in the Index.
6 Spark Plug Replacement* -
7 Spark Plug Wire Inspection*? -
Inspect for burns, cracks or other
damage. Check the boot fit at the
coils and at the spark plugs.
Replace wires as needed.
ITEM
NO. SERVICE
8 Air Cleaner Filter Replacement*-
Replace every
30,000 miles
(50 000 km) or more often under
dusty conditions. Ask your dealer
for the ’proper replacement inter-
vals for your driving conditions.
Inspection*?
- Inspect fuel tank,
cap and lines (including fuel rails
and injection assembly) for
damage or leaks. Inspect fuel cap
gasket for an even filler neck
imprint or any damage. Replace
parts as needed. Periodic replace-
ment of the fuel filter is not
required.
9 Fuel Tank. Cap and Lines
* An Emission Control Service.
t The U.S. Environmental Protection Agency
or the California Air Resources Board has
determined that the failure to perform this
maintenance item will not nullify the emission
warranty or limit recall liability prior to the
completion
of vehicle useful life. General
Motors, however, urges that all recommended
maintenance services be performed at the
indicated intervals and the maintenance be
recorded in “Section
E: Maintenance Record.”
I -I
237. . .

Downloaded from www.Manualslib.com manuals search engine Maintenance Schedule
Section D: Recommended Fluids & Lubricants
NOTE: Fluids and lubricants identified below by name, part number or specification may be obtained from your GM Dealer.
USAGE FLUID/LUBRICANT
Engine Oil
API service SH or SG Energy Conserving I1 oils of the proper viscosity. To determine the
preferred viscosity for your vehicle’s engine, see “Engine Oil” in the Index. The engine requires
a special oil meeting GM Standard GM4718M. Oils meeting this stan\
dard may be identified as
synthetic, and should also be identified as API Service SH. However, not all Synthetic API
Service SH oils will meet this GM Standard.
You should look for and use only an oil that meets
GM Standard GM4718M.
Engine Coolant
50/50 mixture of 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.
Hydraulic Brake Delco-Supreme
ll@ Brake Fluid (GM Part No. 1052535 or equivalent DOT-3 brake fluid).
System
Hydraulic Clutch System Hydraulic Clutch Fluid
(GM Part No. 12345347 or equivalent).
Parking Brake
Chassis lubricant (GM Part No. 1052497 or equivalent) or lubricant meeting requirements of
Guides NLGI Grade 2, Category LB or GC-LB.
Power Steering
GM Synthetic Power Steering Fluid (GM Part
No. 12345866 or 12345867 or equivalent).
System
Manual Transmission
Transmission DEXRON@-I11 or
DEXRON@-IIE Automatic Transmission Fluid.
Automatic Manual Transmission Fluid
SAE 5W-30 (GM Part
No. 1052931 or equivalent).
. . .244

Downloaded from www.Manualslib.com manuals search engine Maintenance Schedule
Section D: Recommended Fluids & Lubricants (Cont.)
USAGE FLUID/LUBRICANT
Hood Latch Assembly
a. Pivots and Spring
b. Chassis lubricant (GM Part No. 1052497 or equivalent)
or lubricant meeting requirements of b. Release Pawl a.
Engine oil.
Anchor
NLGI Grade 2, Category LB
or GC-LB.
Hood and Door
Hinges, Fuel Door
Hinge, Rear
Compartment Lid
Hinges, Concealed
Headlight Hinges,
Hatch Hinges, Folding
Front Seats
Weatherstrips Engine oil
or Lubriplate Lubricant (GM Part No. 1050109).
Dielectric Silicone Grease (GM Part No. 12345579 or equivalent).
See “Replacement Parts” in the Index for recommended replacement filters, valves and spark plugs.
. . .246