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Show Spark Plugs Important for Increasing Power Some tests recently made la one of the automobile manufactuer's laboratories labora-tories showed that an automobile engine en-gine In which the spark plugs had been used for more than 12,000 miles developed 31.2 horse power when run at an engine speed equivalent to 20 miles per hour. The same motor run at the same speed with a new set of spark plugs produced 38 horse power, an increase of 6.S horse power, or 21.8 per cent. This shows the Importance of good plugs for Increasing power and decreasing fuel consumption. |