Chevrolet 2003 Monte Carlo Owner's Manual page 254

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 identified as SA€ 5W-30. If you
cannot find such
SAE
5W-30 oils, you can use an
SAE 1OW-30 oil which has the API Starburst symbol, if
it's going to be 0°F (-18°C) or above. Do not use
other viscosity grade oils, such as SA€ IOW-40 or
SAE 20W-50 under any conditions.
As shown in the following chart, if you have the
3800 V6 engine, SA€ 1OW-30 is the viscosity grade
recommended for your vehicle. However, you can use
SAE 5W-30 if it's going to be colder than 60°F
(16°C) before your next oil change. When it's very cold,
colder than 0°F (-18"C), 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 S A E IOW-40 or SAE 2OW-50 under any
conditions.
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
L
c
$'
F
+
100-
1
+
* 8 0 1
601
t
40
+ 20
0 -
I
WEATHER
I
-
SAE 5W-30
-
I -
SAE
I
1DW-30
PREFERRED
above 0°F
(-l WC)
DO NOT USE SAE 2OW-50 OR ANY OTHER
GRADE OIL NOT RECOMMENDED
3800
(Code
K)
V6 Engine
5-1 9