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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
LOOK
FOR
THIS
SYMBOL
!
t40
+
20
I
-
SAE
1OW-30
COLD
WEATHER
00
NOT
USE
SAE
2OW-50
OR
ANY
OTHER
GRADE
OIL
NOT RECOMMENDED
As
shown in the chart,
SAE
5W-30 is best for your
vehicle. However, you can use
SAE
low-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.
If
you are
in
an area where the temperature falls below
-20°F
(-29°C)'
consider using either an
SAE
5W-30
synthetic oil or an
SAE
OW-30
oil. Both will provide
easier cold starting and better protection for your engine
at extremely low temperatures.
Engine Oil Additives
Don't add anything to your oil. Your Buick dealer is
ready
to
advise
if
you think something should be added.
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