The Microgreen filter design was essentially a "bypass" element inside a regular spin-on. A small amount of oil would continually flow through the super fine filtering material to filter the oil down to 2 microns ... the "bypass" part of the filter.
Remember microGreen?
- Thread starter Zee09
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Back in late '16, early '17, I tried Microgreen filters on my wife's Outback. I ran 2 of them, back to back, and then ran a used oil analysis after the second one. The used oil analysis didn't show any real difference between the MIcrogreen and the NAPA Gold filters that I normally use. so I never spent any more money on them and went back to the NAPA Gold filters.
The experience left me with the opinion that the whole Microgreen filtration claims as nothing more than hyperbole.
The experience left me with the opinion that the whole Microgreen filtration claims as nothing more than hyperbole.
Yeah, wonder why Microgreen isn’t around anymore. I wasn’t ever sold on them.
Looking at ppm of Fe on a used oil analysis doesn't tell you much about how the oil filter is working. Neither does the used oil analysis "% insolubles". You need to do an ISO 4406 particle count to see the real effect of the filter on oil cleanliness. used oil analysis like what Blackstone use only detects ppm particles of around 5u and below.
This was interesting PC data plotted for comparison - data from UOA PC info posted on BITOG. The Microgreen seemed to actually take out the finer particles, but still let a lot of the bigger stuff through the regular media. The Ultra did better above 10 microns.
It was teflon/ PTFE
I think the term they liked to use was "parallel flow", bu you are correct that is how it worked.
