Geo Prizm 1997 Owner's Manual page 233

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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
-
"F
b
100
+
80
+ 60
+
4u
+
20
0
/
L
!
I
u
COLD
"C
t
38
t
27
t
16
t.4
- 1
-
18
\
I -
I
I
SAE SW-30
PREFERRED
I
WEATHER
I
SAE
I
1OW-30
DO NOT USE
SAE 2OW-50 OR ANY OTHER
GRADE OIL NOT RECOMMENDED
As shown in the chart, if you have the 1.8L (Code 8)
engine, SAE 5W-30 is best for your vehicle. However,
you can use SAE 1OW-30 if it's going to be 0°F
(-
18
O
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.
6-15

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