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 - Tractor Profile: Oliver 70 Row Crop - by Staff. The Oliver 70 was part of the "Fleetline Series" and was manufacturered from 1937 to 1948. The row-crop configuration could have either dual or single front wheels. The Oliver 70 was also offered in the standard, orchard and industrial configurations. The tractors were sold in Canada. An early advertisement states "Power when you want it - power when you need it - power to help put in crops when field conditions are right and time and help are limited. That's the power you'll find in an Oliv
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