Quote:
Originally Posted by radz28
Studies, even when conducted by ASTM-type methods, do not necessarily, always, reflect real-world. I work in a lab, and perform testing according to ASTM methods, so I might have a bit of real-world experience... I'm not saying it's black-and-white, and that lab testing SHOULD be black-and-white, but the world is not. I'm leaning toward the real-world-testing from Z', but that's me.
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I agree here, lab studies often create a worst case scenario which is not often the same as real world. I stand by what I said, if your car is driven on the street, oiled cotton is "good enough". I won't argue that it may be 1% less effective than a paper filter, but does that really translate to anything meaningful long term? Based on anecdotal evidence from real world users, it makes no difference at all. Based on my own oil samples, it makes no difference at all. I've also stated repeatedly if the car is stock there's no need to replace the OEM paper filter with an oiled cotton filter unless you just want a lifetime filter. However, when you start modifying your vehicle, there is a point where a paper filter becomes a restriction compared to an oiled cotton filter and that's when one should be considered because its unlikely you've find a larger capacity paper filter to flow more air. All of these companies making oiled cotton filters are still in business today after decades, not because of marketing, but because they do the job they were designed to do.