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Some basic things to check to ensure optimum fuel economy:
- Tune-up items (initial timing, dwell, idle mixture & speed, tappet clearance, etc)
- Condition of air & fuel filters
- Condition of choke system
- Condition of ignition system (points & condenser, cap, rotor, wires, spark plugs)
- Condition of centrifugal & vacuum advance mechanisms
- Condition of emission control systems (as equipped):
- Manifold Heat Control System
- PCV (Positive Crankcase Ventilation) System
- EGR (Exhaust Gas Recirculation) System
- Heated Air System
- Evaporation Control System
- Tire pressure
- Engine operating temperature
- Eliminating unnecessary weight (ie, junk in the trunk)