I"ve never seen any hard data on this but if I was concerned about this question ,I"d pull the valve cover off and see if there was sludge on the valve train components. if there was then I"d think i ought to change the oil more often. If you don"t see any sludge then all is probably well with your oil change schedule. If you want to be certain, have your oil analyzed
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Today's Featured Article - The Ferguson System Principal An implement cutting through the soil at a certain depth say eight inches requires a certain force or draft to pull it. Obviously that draft will increase if the implement runs deeper than eight inches, and decrease if it runs shallower. Why not use that draft fact to control the depth of work automatically? The draft forces are
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