I disagree that you will have no problem using detergent oil if the engine has always had non-detergent oil. I did that very thing on a Ford flat head engine; the engine started using oil, smoking, and the pressure dropped considerably. Apparently what happened is the detergent oil loosened up all the crud that never got drained, and circulated it throughout the engine, causing wear, and increasing clearances. The two oils act totally differently regarding dirt and contaminants. Non-detergent oil lets all that stuff settle to the bottom; detergent oil holds it in suspension so it can be drained out - that's why you want to get everything warm before draining. If an engine with non-detergent oil is left to sit a long time, the dipstick will show you nice clean oil; all the dirt has settled out. Detergent oil will still be black - it's holding the dirt so it can be drained away.
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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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