Originally Posted by
IchabodCrane
I saw this video of oil filter comparison. Found it interesting how filters that look the same can be very different inside. This may be evidence that you do get what you pay for. (ignore the brand content..)
In the video, Neil of Messick Farm Equipment makes some good points but I find some shortcomings with his presentation.
1. He notes the weight difference between the NAPA (made by Wix) filters and the Kubota filter, and goes on to suggest that an increased weight can withstand more pressure. I don't doubt this claim but how much pressure does a filter need to withstand? Have you ever actually witnessed a burst filter can? I have not.
2. Filter size
Neil notes the difference in filter lengths. A larger (as in longer) filter may be able to trap a greater quantity of particulates but not necessarily smaller sizes. I understand this is referred to as a filter's efficiency. The Kubota filter's efficiency is never stated. Wix publishes their filter specifications, including efficiency.
I have seen filter disassembly demonstrations that stretch out the filter media and flatten it's pleats. Any of the Wix filters may be longer than the Kubota filter when stretched out, and that's what the pleats are all about - fitting more in the same space. Again, this is no indication of a filter's efficiency.
3. Neil mentions the gasket material and how the Kubota gasket seems more pliable to him. Does it or does it not seal? Maybe the firmer Wix filter gasket withstands higher temperatures - this is neither measured nor discussed. In my understanding, so long as the filter does not leak during operation, the gasket is sufficient. I know of no reports problems with Wix filter gaskets, so there's that.
4. Neil briefly discusses the anti-drainback valve in his demonstration. Without going into great detail, an anti-drainback valve has limited use on horizontally mounted filters, and it not needed on vertically mounted filters. I would be interested in discussing the usefulness of anti-drainback valves, and this appears to be the place for such a discussion.
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