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Show Higher Grade of Fuel for Use During Winter Most ears require a different grade of gasoline in winter, as compared with the summer months, and also a lighter grade of oil and gear luhri-cant, luhri-cant, says a bulletin issued by the mechanical first aid department of the Chicago Motor club. The reason why a better grade of gasoiine. particularly one possessing easy starting qualities, is because the air with which the gasoline is mixed Is colder in winter, and also the temperature tem-perature of the intake manifold is usually lower. Virtually all filling stations sell a good winter gasoline. The agency of the make of car is always in a position to advise owners as to the best oil. Some cars use the same consistency of oil the year around ; most, however, are designed for thinner lubricant in winter. Honest Hon-est and to the minute filling stations usually offer the right grade of oil for the car in question ; the Chicago Motor Mo-tor club does not, however, advice motorists mo-torists to trust all stations to recommend recom-mend the correct oil. The reason that a comparatively thin oil is batter In winter is because oil thickens in low temperatures; frequently the "drag" of the pistons against the cylinder walls and other sources of friction cause an excessive load on the starter if the oil is too thick or it is too cold. The choke should be used sparingly. Excessive use of this aid to starting will result in undue amounts of raw gasoline being drawn into the cylinders, cylin-ders, and a certain amount, depending upon the efficiency of the piston rings, will leak past the pistons into the crank case, thereby diluting the crank case oil. Whenever the starter encounters difficulty in spinning the engine because be-cause of cold oil. the crank should be used to loosen the engine. This practice prac-tice will save the battery from undue drain. Many car manufacturers advise a lighter lubricant in the gear case, and also in the differential housing. Ascertain As-certain from the agency handling the car what grade of oil or grease is best in those parts, and act accordingly. |