Show ac THE OIL I 1 philosopher X do you exercise the average engineers good judgment by the oil philosopher the tendency of engineers to increase their purchases of union red engine oil ij is an ai indication of their confidence in its maximum efficiency and an appreciation of the gradual reduction in cost of operations obtained by its use I 1 engineers have found that union red engine oil produces results which can be obtained with but few other oils you will never realize the saving and efficiency pro advantages of |