Original oil and gas trade magazine vintage ad for CONTINENTAL OIL COMPANY. No wear with Conoco Super motor oil. To test, six new cars roared over searing desert highways along the Mexican border. After 50,0000 miles in ten weeks of continuous driving, engines had less than one one-thousandth of an inch of wear on crankshafts and cylinders. Art of Rio Grande Valley, Texas. This unique 1950 petroleum products and gasoline industry magazine advertisement would display beautifully matted and framed.