National Geographic : 1936 Aug
SCIENTIFICALLY, Havoline differs from other premium-priced, widely-known, paraffin-base oils in that it is not a mixture of residual cylinder stocks and low viscosity oils, but is wholly distilled in all grades MODERN PREMIUM OIL IS distilled There are two ways to make motor oil One is by blending. The other, by distilling. Distilled oil is first turned from the crude oil into a vapor, then condensed into pure, clean oil. Tarry impurities, so harmful to your motor, are left behind, because they do not distill. Many premium-priced oils, however, are only partly distilled. They are partly blended in order to give them "body." Havoline is 100% distilled. Every drop of Havoline is first vaporized. Nothing is added to Havoline. The only premium-priced motor oil, nationally distrib uted, that is 100% distilled in all grades. Buy Havoline! It keeps your engine clean. It does not form the hard carbon that costs you so much to remove. Indian Refining Company, Indianapolis. Affiliated with The Texas Company.