Sulfur is is not a good lubricant. In fact, it's too caustic for most engine metals. Zinc, in the form of ZDDP is best for resisting cam spalling. Some of the 'high mileage' or 'vintage car' oils have ZDDP levels of 1100 or 1200ppm, and are good for flat tappet and roller tappet cams, where the spring pressure is significant.
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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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