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Show Better Performance at Less Cost From Old Cars How to get better performance at lower cost from motor cars that are several years old, is told in a paper just prepared by H. Itahezzana, research re-search engineer, and known as one of the country's foremost authorities on the internal combustion engine. To quote Mr. Itnbezzana : "Some engines after they become old have a tendency to 'pump oil.' The reason is that the rings no longer fit tightly. In many cases even new rings are of little value when the cylinder Itself is ever so slightly 'out of round.' Sometimes the amount of oil that gets into the chamber Is so slight that It cannot be detected as oil, but appears as a thick, or gummy soot upon the head of the piston, or on the spark plugs. "How to keep such motors running well has long been a problem with repair re-pair men. In nearly every instance, new plugs are fouled up within a short time atfer installation. "As a remedy, carbon-proof spark plugs of the correct type are the most logical plugs for engines that have a tendency to foul the spark plugs. Thsse plugs also are desirable for cool engines. en-gines. "They have what is known as a carbon-proof Insulator, with a series of high-temperature fins girdling the L lower end. These fins quickly attain sufficient heat to burn off any deposits de-posits of soot or oil, thus offering effective ef-fective resistance to carbon troubles." |