I know what I see. I've been fighting this stuff for 3 years now. Here's the filters I've changed just in the last week. If you can find a better blend then maybe you should be selling it to the City here. Some of these filters are only two weeks old.
I have more picture on another computer that shows the screens from out of fuel site despencers. It looks like tar and takes hot boiling acid to get the stuff off.
Have you ever tried to clean the cooking grease off of the overhead stove vent at home. Well multiply that times thousands of gallons that pass thru the screen/filters. Not my motor! NO way! the political correctness is for the jack ass.