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Buick REGAL 1996 Manual page 235

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RECOMMENDED SAE VISCOSITY GRADE ENGINE OILS
FOR BEST FUEL -------ylY AND COLD STARTING, SELECT THE LOWEST
SAL VlSCOSlTV
bnmws
DIL FOR THE EXPECTED TEMPERATURE RANGE.
-
HOT
WEATHER
LOOK
FOR T H I S
SYMBOL
"F
4-
100
+ 801
t 6 0 .
+ 4 0 -
t
20
0 .
j
,
+
16
i 4
- 7
COLD
WEATHER
SAE CW-30
PREFERRED
00 NOT USE SAE 2OW-50 OR ANY OTHER
GRADE OIL NOT RECOMMENDED
3.1 L L82 (Code M) Engine
As shown in the chart, unless you have the 3.8L engine,
SAE 5W-30 is best for your vehicle. However, you can
use SAE low-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 20W-50.

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