IIRC they have to be reasonably well matched to the engine CFM requirements to work efficiently . The only cons why they went out of use is cost , and quicker to change filter cartridges. They were universally specified in military vehicles , when performance over cost was priority, also no need to carry any extra materials as when engine oil was changed the old oil could be used in the filter . HTSH
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Current : 2007 Mowag Bucher Duro 6x6 Motorhome , 2006 Sedici 4x4, 2007 Range Rover supercharged
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