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o & eaE : / - ’," CONOCO'S CHALLENGE CONFIRMED! on America's Greatest Motor Proving Ground PIKE'S PEAKI Now it can be told. .. the true story of motor oil merst! For this was a test of America’s representative motor oils in competition! A daring thing for CONOCO to do, done in confidence. Confidence based on the now-proven advantages of Germ-Processed oils . .. These tests brought out facts about motor oils which should affect the pocket- book of every motorist . ., . Facts which we believe should force a'-swinging to Germ-Processed Motor Oils by every reader of our message. Three Other Popular Oils Were Tried . . . Side By Side With CONOCO Germ-Processed Other oils often have been “tested” on speedways, in cross-country dashes, and over the ocean. But they were “vested"” only against operating conditioms! CONOCO'S Germ-Processed ‘:‘l‘li was roven against operating. conditions, gfllln m:;alrbu with. other oils as well!. The CONOCO Germ-Processed. oil proved its superiority in the Pike's Peak Tests and with such finality, that now all motorists will know the facts . . . know how the wearing grinds up to the top of Pike's Peak and down again, up and ‘down again, and again, showed each oil in its true colors . . . and how the Germ-Processed film so defied the clawing talons of friction that test thermometers showed lessened water and oil temperatures, to the amazement of disinterested engineers! Motor Parts Were Measured After Each Oil Was Tried . . . Cylinders were measured with a micrometer, at top and bottom, pistons likewise, and the cylinder taper accurately recorded, after each oil was tested. These measurements were accurate to one ten-thousandths of an inch. This is what the reports of the test developed. Comparing the wear with the use of CONOCO Germ-Processed oils against average wear with the other oils, showed a Association Ne. 3360 Pike’s Peak Tests Conducted Under AAA Supervision . . American Automobile Association observers purchased-all oils used in the open market; placed them in separate containers, marked them with a code letter, and locked them up. All crankcase fillings were made by AAA observers who then sealed the inlets and outlets of each motor. All gasoline allotments, every temperature reading, every micrometer measure- ment, every test was checked by an AAA observer. Duri:F every moment of the test,an AAA observer was riding in each car. The records of this test were initisled by an AAA observer as each entry of fact was made, and will be shown to any person on request to the company. CoNoco's Superiority Was Proven Under AAA Supervision * Lubricity means slipperiness, sm lower co-efficient of friction, as com oil. The Extra Lubricity of CO! Processed oils is due to its a penetrate metal surfaces! . Thus Processed oil brings a lubri friction to your motor of the motor metal. CONOCO gives you fa Y, 2 minimum of it becomes a part ... The Pike's Peak Tests reveal that your automdbile motor can last longer . . . that your operating expenses can be lowered! Will you drive in decrease in wear in favor of CONOCO today,at the Sign of Germ-Processed oils of 76.4%. the Red Triangle? Send for Free Booklet G E RM IMPORTANT: Send for the Booklet, *“Pike’s Peak Tests Confirm CONOCO'S Challenge,” which gives a detailed PRO CE narrative of these tests with illumi- PARAFFIN PRt MOTOR OIL nating charts and photographs. Address, ental Oil &m i 53¢ Per Quort . . . for All Grades Except Special Heavy on Extra- Heavy BASE