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Show BIG IMPORTANCE . OF LUBRICATION Many Motorists Fail to See Why Frequent Change of Oil Is Vital. In spite of the fact that manufacturers, manufac-turers, garage men and dealers constantly con-stantly stress the importance of frequent fre-quent oil changes in engine lubrication, lubrica-tion, many motorists full to see why this changing is so vital. The introduction of improved lubrication lubri-cation systems, oil filters and devices to lessen oil dilution in' tho crankcase lias done much to cut down lubrication lubrica-tion troubles, but the subject of nil changing still demands the careful attention of the motorist. What Happens to Unchanged Oil. What happens when you fail to change oil? In the first plae:, heat produces a chemical change in oil which causes it to lose its Inhrhating qualities. Casiiline 'nay become mixed with the oil, lowering its elliciencyt M'hen there is no oil filler, particles of metal from the wearing surfaces and a certain amount of dirt and rust which accumulate in flie crankcase oil may lie forced to the engine operating op-erating parts. I'nlo.is all the oil is drained cut of the crankcase, foreign matter will remain there. It Is not sitflicient to add only enough oil to lteep the proper level. A new engine requires more frequent fre-quent oil changes than an engine which is "broken in," because new hearing surfaces throw off a greater number of metal particles. After the first 500 miles of driving, it is advis- able to change- the oil in the engine. Tiepeat this operation every 2,500 miles In warm weather, and every 1,-000 1,-000 miles in cold weather. What Kind of Oil to Use. Fortunately for the motorist, oil service is today so highly developed that It Is possible to get disinterested advice from filling-station service men, oil dealers and garage men as to the best type of oil to use for your engine. In addition to this, manufacturers Issue Is-sue booklets of instruction with new cars, telling just what sort of oil to use for best results. Itememher that, at speeds of 40 miles an hour or greater, oil consumption consump-tion by the motor Is considerably higher that at lower speeds. With ordinary or-dinary driving, the motor may consume con-sume one quart of oil every 1.5 miles of travel, but this amount becomes greater as speed increases. |