<div class="htmlview paragraph"><b>HIGH-compression engines for automobiles, Mr. Kettering predicts, are not far off if the petroleum and automobile industries cooperate in their development.</b></div> <div class="htmlview paragraph"><b>An engine operating at high compression ratios, he points out, gives impressive gains in economy over the entire driving range, and without any sacrifice in smoothness.</b></div> <div class="htmlview paragraph"><b>Mr. Kettering reaches this conclusion as the result of an extensive testing program of an experimental engine of 12.5 to 1 compression ratio. The tests were carried out both in the laboratory and on the road with the engine installed in a car.</b></div>