2003 CHEVROLET IMPALA oil viscosity

What Kind of Engine Oil to Use
Oils recommended for your vehicle can be identi®ed by
looking for the starburst symbol.
This symbol indicates that the oil has been certi®ed by
the American Petroleum Institute (API). Do not use
any oil which does not carry this starburst symbol.
If you choose to perform
the engine oil change
service yourself, be sure
the oil you use 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 certi®ed
for gasoline engines.
You should also use the proper viscosity oil for your
vehicle, as shown in the viscosity chart.
3400 (Code E) V6 Engine
5-18

As in the chart shown previously, if you have the 3400
V6 engine, SAE 5W-30 is the only viscosity grade
recommended for your vehicle. You should look for and
use only oils which have the API Starburst symbol
and which are also identi®ed as SAE 5W-30. If
you cannot ®nd such SAE 5W-30 oils, you can use an
SAE 10W-30 oil which has the API Starburst symbol,
if it's going to be 0ÉF (-18ÉC) or above. Do not use other
viscosity grade oils, such as SAE 10W-40 or
SAE 20W-50 under any conditions.
As shown in the following chart, if you have the 3800
V6 engine, SAE 10W-30 is the viscosity grade
recommended for your vehicle. However, you can use
SAE 5W-30 if it's going to be colder than 60ÉF
(16ÉC) before your next oil change. When it's very cold,
colder than 0ÉF (-18ÉC), you should use an SAE 5W-30
oil. These numbers on an oil container show its
viscosity, or thickness. Do not use other viscosity
grade oils, such as SAE 10W-40 or SAE 20W-50 under
any conditions.
3800 (Code K) V6 Engine
5-19

Part D: Recommended Fluids and
Lubricants
Fluids and lubricants identi®ed below by name, part
number or speci®cation may be obtained from your
dealer.
Usage Fluid/Lubricant
Engine OilEngine oil with the American
Petroleum Institute Certi®ed for
Gasoline Engines starburst symbol
of the proper viscosity. To determine
the preferred viscosity for your
vehicle's engine, see
Engine Oil on
page 5-16.
Engine Coolant50/50 mixture of clean, drinkable
water and use only DEX-COOL
ž
Coolant. SeeEngine Coolant on
page 5-27.
Hydraulic Brake
SystemDelco Supreme 11 Brake Fluid or
equivalent DOT-3 brake ¯uid.
Windshield
Washer SolventGM Optikleen
žWasher Solvent or
equivalent.
Power Steering
SystemGM Power Steering Fluid (GM Part
No. U.S. 1052884, in Canada
993294, or equivalent).
Automatic
TransaxleDEXRON
ž-III Automatic
Transmission Fluid.
Usage Fluid/Lubricant
Key Lock
CylindersMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241, in
Canada 10953474, or equivalent).
Hood Latch
Assembly,
Secondary
Latch, Pivots,
Spring Anchor
and Release
PawlLubriplate Lubricant Aerosol (GM
Part No. U.S. 12346293, in Canada
992723, or equivalent) or lubricant
meeting requirements of NLGI #2,
Category LB or GC-LB.
Hood and Door
HingesMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241, in
Canada 109435474, or equivalent).
Weatherstrip
ConditioningDielectric Silicone Grease (GM Part
No. U.S. 12345579, in Canada
10953014, or equivalent).
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