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Recommended Viscosity
The following chart will serve
as a guide for selecting the proper
oil viscosity.
The proper viscosity helps as-
sure good cold and hot starting
by reducing friction and thus
increasing cranking speed.
RECOMMENDED SAE VISCOSITY NUMBER
I
I
. .
I
_.I'l".·_IIl·.·.I._ln·, P\l._.In·.·J!II' · •
I
I
...
• _111'.'.1 ._111·.· ••
I
I
I
•
•
r
I
-30
-20
0
20
40
60
80
100
TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE.
of.
NOTE: SAE 5W-20 oils are not recommended for sustained high-speed
driving.
SAE 30 oils may be used at temperatures above 40°F.
Engine Tune-Up, Emission
Control and Electrical
System Checks
Fuel and electrical systems are
subject to wear and contamination
and require periodic cleaning and
adjustments to maintain maximum
economy and performance. Proper
adjustment of carburetor idle speed
engine timing and dwell, and oper-
ation of the Positive Crankcase
Ventilation Valve (PCV) are im-
portant to control hydrocarbon
and CO emissions within govern-
59
ment legislated levels. These ad-
justments sould be made at the
first oil change (4 months or 6,000
miles, whichever occurs first). The
above fuel and electrical system
checks also are included in engine
tune-ups which are recommended
at one year or 12,000-mile inter-
vals .
Positive Crankcase
Ventilation Valve
Replacement
Crankcase vapors and other im-
purities can cause malfunction of
the crankcase ventilation valve.
Regular replacement of the PCV
Valve is recommended at 24-
month or 24,000-mile intervals.
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