Buick 1994 Roadmaster Owner's Manual page 235

What Kind of Oil to Use
Beginning midyear 1993, oils of the proper quality for
your vehicle will be identified with this new "starburst"
symbol. The "starburst" symbol indicates that the oil has
been certified by the American Petroleum Institute
(API), and is preferred for use in your gasoline engine.
" I
You should look for
'this on the front of the
oil container, and use
only oils that display
this new symbol.
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
"F
~
100
+
80
+
60
+
40
+
20
0
~
COLD
WEATHER
LOOK FOR
ONE OF THESE
LABELS.
\E 1OW-30
SAE 5W-30
PREFERRED
IF NEITHER SAE 5W-30 NOR SAE 1OW-30
GRADE OILS ARE AVAILABLE, SAE 30
GRADE MAY BE USED AT TEMFERATURES
ABOVE 40 DEGREES F (4 DEGREES C).
ANY OTHER GRADE OIL NOT RECOMMENDED
DO
NOT
USE SAE 1OW-40, SAE 2OW-50 OR
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