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Recommended Viscosity
The following chart will serve as
a guide for selecting the proper oil
viscosity.
The proper viscosity helps assure
good cold and hot starting by re-
ducing friction and thus increasing
cranking speed.
OSITY NUMBER
-20
0
20
60
0
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
operation of the Positive Crankcase
Ventilation Valve (PCV) are im-
portant to control hydrocarbon
and CO emissions within govern-
54
ment legislated levels. These ad-
justments
should
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.
Air Injection Reactor (A.I.R.)
The Air Injection Reactor sys-
tem
should
have the A.I.R. pump
drive belt inspected for wear and
tension every 12 months or 12,000
miles, whichever occurs first.
Positive Crankcase
Ventilation Valve
Replacement
Crankcase vapors and other im-
purities can cause malfunction of
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