Low ash oil for particulate emissions and two stroke Detroit diesels has fewer pressure point additives such as zinc. There is high pressure and shearing which occur typically between a cam lobe and flat tappet cam follower with a low rpm/light valve spring pressure engine. Now try a high rpm/high valve spring pressure flat tappet cammed engine without extra wear/pressure additives. Anybody ever wonder why Detroit diesel two strokes and Deere on the two cylinder injection pumps used roller cam followers? These high pressure additives lube oils when burned in leaky and worn engines. The residue is a hard metallic ash which fouls ports, sticks rings, sleeve ports and scores cylinder walls etc.
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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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