Hmm, maybe the Mobil 1 full-flow filter's numbers look better than MicroGreen's graphed numbers because different types of particulate tests were used? BTanchors may have used the pore blockage test with mathematical extrapolation (common for the darker oil obtained from full-flow filters), whereas MicroGreen may have used the type of particle count test used for clearer by-pass filter oil, perhaps the ISO 11171 method to obtain an ISO 4406:99 cleanliness code. I don't really know, though, and MicroGreen doesn't mention the type of test they used on their web page that shows their two graphs. MicroGreen should have mentioned the test used.
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