Show good performance will depend on spark plugs spark plug must bp be in good condl ton and the electrodes must be adjusted correctly for or not only satisfactory allaround all around performance but especially to relieve strain on the battery and facilitate easy starting which la Is so important during the winter season A surprisingly large percentage of poor performance may be traced and often eliminated by an examina examination ilon of the park plugs hard starting blurting missing at atlow low idling speeds sluggishness and power loss on little hills find and hard pulls are often traceable to the spark plugs this ts is why car manufacturers recommend that spark plugs be renewed every miles and inspected at least twice a year |