Quote:
Originally Posted by Z OH 6
Unquestionably, oiled filters flow better than dry filters for about a 1% less filtration rate when properly oiled. That being said, you probably wouldn't get any arguments out of anyone that has a high horsepower application that could get a dry filter that would flow as well as an oiled filter. Problem is that some of the high performance oiled filters are quite large now in order to keep up with the flow demands of today's really high horsepower engines especially when modified so with underhood space being a premium, it's a bit difficult to get a dry filter that flows as well as oiled filter that isn't 30% larger in size. You can get away with those on lower power engines because the filter size of a dry filter is still large enough to flow the volume needed for an average engine but ultimately, when there's enough power being made, no dry filter is good enough without robbing power, same reason why some REALLY high horsepower drag cars run NO filter at all, less restriction and there's no oiled filter big enough to keep up with those power demands.
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I never suggested that dry filters could outflow a properly oiled oil filter. If you go back to my original post it was closed with "Food for Thought"
For those high HP applications with folks willing to properly maintain an oil filter it can be the the way to go.
For those who may not a dry filter may be the right choice.
But to imply that an oil filter is foolproof in all cases is just misleading.