Buick 1994 Skylark Owner's Manual page 217

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
t
100
;il
+
20
D
COLD
J
I
"C
t
38
t 27
t
16
t 4
- 7
-
18
WEATHER
LABELS
SAE !TW-30
PREFERRED
IF NEITHER SAE 5W-30 NOR SAE 1OW-30
GRADE OILS ARE AVAILABLE, SAE 30
GRADE MAY BE USED AT TEMPERATURES
ABOVE 40 DEGREES F (4 DEGREES C).
ANY OTHER GRADE OIL NOT RECOMMENDED
DO NOT USE SAE 1OW-40, SAE 2OW-50
OR
As shown in the 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 1OW-40 or SAE
If you cannot find oils with the new "starburst" symbol
on the front of the container, you should look for and
use oils containing the following three things:
SHor SG
20W-50.
"SH' or "SG" must be on the oil container, either by
itself or combined with other quality designations,
such as "SH/CD," "SH,SG,CD," "SG/CD." etc.
These letters show American Petroleum Institute
(API) levels of quality.
SAE 5W-30
Energy Conserving I1
Oils with these words on the container will help you
save fuel.
These three things are usually included in a doughnut
shaped logo (symbol) on most containers. I f you cannot
find oils with the "starburst" symbol, you should look
for oils with the doughnut shaped symbol, containing
the three things noted above.
m
215