I'd also like to see your "10 pages...". I see a couple potential bad assumptions in your statement. First, the air does not bubble through the oil. It passes over the top of the oil where the heavy stuff falls out, and then passes through the mesh which is covered with oil mist sucked up off the oil in the bottom of the filter. Bubbles have nothing to do with how it works.
Also, as someone else pointed out, air flow through the mesh would be turbulent flow, not laminar flow.
As a point of comparison, what do you think a K&N filter is? It's nothing more than a mesh covered with oil. If a K&N can remove fine particles with air passing through a single thin layer of mesh, how come air passing through inches of oiled mesh in an oil bath filter won't have even more particles removed?
I did a quick search & didn't find any definitive comparisons of filter performance. I'd suspect that manufacturing costs probably had a lot more to do with the change to disposable filters than filter performance did. I also saw something about emissions...apparently the oil mist from an oil bath air cleaner increases emissions.
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Today's Featured Article - Fasteners: The Nuts and Bolts of Nuts and Bolts - by Curtis Von Fange. The nuts and bolts of nuts and bolts is an interesting and essential piece of knowledge that applies to our older tractors. An improperly torqued capscrew on an engine head or a shear bolt that is too hard on the driving shaft of a bushog can create havoc and make an expensive and uncalled for repair. Let�s examine the purpose and design of these fasteners in order to ensure their proper use. Fasteners are probably one of the aspects of mechanics that is given the least amount of thought.
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