It appears two assumptions are made, regarding contaminates in the pan and contaminates circulated through the engine: 1) an assumption is made that everything in the pan drains out. 2) in the case for draining cold it appears an assumption is also made, that contaminates circulated through out the engine do not remain in the various passages but also collect in the pan awaiting draining.
In my mind oil/contaminates in the engine oil passages, for the most part remain there and do not drain ..... hot or cold. In addition, the best way to insure contaminates in the sump oil are drained is to drain hot, while the contaminates are still suspended through out the oil. Hot or cold ..... some oil always remains in the sump. In the case of draining cold the remaining oil would/could contain collected settled contaminates rather than uniformly distributed suspended contaminates.
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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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