As far as this "test" goes I'd be leary. First it was performed on a filters for a diesel V8 truck engine, second, even they admit in the article "As Arlen learned in attempting his own tests, there are many variables that can adversely affect filter test results. Third, "Temperature & humidity of the test dust and air used in the test are strictly monitored and controlled" which doesn't happen in the real world. Fourth, "A small temperature change or a small change in humidity can cause the mass of a paper filter to change by several grams." In the end you can have test results tailored to whatever outcome you want if you control the input. When these filters are compared on F6B's or Goldwings, in real life situations, then maybe I'll even consider it but this particular study holds no water.
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