Well, I did an experiment with a Fram PH3593A, installed on my Subaru Imprza EJ engine, with 10k miles in use. To test the filter efficiency, I put 20 grams of powdered graphite with average particle size of 8 to 15 microns. After adding the solid lubricant I ran the car for the day, about 15 miles. Next morning the startup was with a rattling for 1 second. I knw the filter was already used beyond reason and the added powder wa the end of it. I ran the car for a week always knocking on the startup. Then I took it out and let it drain for a week, changing positions of it to get rid of all the remaining oil. I oppened the filter with a hammer and a flat screwdriver and the results are below. Most part was filtered! And at cold was running on bypass, becaue it got almost clogged. No carboard nd cap on this one.
Some to the wall, I'm pretty sure the magnet played a role on the can buildup
Nasty, but on the best place to be, inside the filter
This antidrain came from the orange can and looks like silicon for me! Very pliable!
A little more "crème du grafitte" on the bottom.
So, it held up pretty well, even full of dirty. IMO the cheap oil filter is good enough. No tears, and the bypass is fine and save the engine for hundreds of miles in a induced clogged condition.
Some to the wall, I'm pretty sure the magnet played a role on the can buildup
Nasty, but on the best place to be, inside the filter
This antidrain came from the orange can and looks like silicon for me! Very pliable!
A little more "crème du grafitte" on the bottom.
So, it held up pretty well, even full of dirty. IMO the cheap oil filter is good enough. No tears, and the bypass is fine and save the engine for hundreds of miles in a induced clogged condition.
