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f .APRIL 10 JH 1931 Â·iiiini m.ni.1 i n i .I.PIB^ MASON CITY GLOBE-GAZETTE STUDY in 13 Cars completed last night Emblem of Contest Board of American Automobile Astn. latest models used in series of motor oil track tests running 25 days Â· BUICE HUDSON CADILLAC NASH CHEVROLET OLDSMOBILE CHRYSLER PONTIAC CORD REO FORD STUDEBAKER WILLYS-KNIGHT This advertisement approved by ' Contest Board of A. A. A, Conducted by Contest Board of A. A. A on Indianapolis Speedway makes whirled around the Indianapolis Speedway in probably the most thorough and comprehensive lubrication study ever made. Day and night the work went on. Relays of drivers rolled up a total mileage for all cars exceeding 100,000 miles. The Contest Board of the American Automobile Association conducted this work and is compiling the results for certification. The records involve almost 1,000,000 calculations. Close to 100 men were employed on this project. Its broad scope and thoroughness attracted wide attention. Car manufacturers sent Here are some of the technical question -ludedinthiselaboratelubHcaZstudy * Â«Â«-.-- 2 Effect of speed on oil consumption? 3 Volume of carbon formed ivith various grades (viscosities) of oil at different speeds? 4 Engine wear at known speeds with various grades of motor oil? ew Soon these cars will take to the road on extensive individual tours. These tours will serve a dual purpose. First, to deliver lo automobile dealers the certified results of the lubrication study and give them the privilege of inspecting their ear. Second, to carry on the lubrication study under the identical conditions that your car faces every day. Watch for these ears. The broad scope and thoroughness of this work explains why Standard Oil Company (Indiana) is able to provide you with motor oil that meets exactly the lubricating requirements of your car. o=vis O I L ako is refined b our n ciency whlch fc exceeded only by New ^. O I X O M P A "