Let me first say that I am not a big fan of the design with the cartridge style stainless element. But since it always seems to be a debate here I figure I would post some real world experience with this filter and not theories and opinions. I just bought the boat and decided to stand on it a little harder. It ran awesome, turn key.
When I finally tore the engine down the stainless element was so gummed up we could not believe oil even flowed through it. My dad has had a shop for 25 years and he was floored. It is probably still usable after we cleaned it.
Anyway here is what we took it out of:
12 years old!
1100 hp quad rotor
257 hours on the motor
Original bearings from the original build.
I was looking for a filter to install on the System One remote when my old man goes "WHY?! Whats wrong with those bearings? Looks like the thing did its job". And he's right. The bearings are a pass in my book.
Most people, if the have 1000+ HP in their canoe, rarely go 12 years and 250+ hours. Bearings tell a great story. So I guess they do work regardless of the micron rating.