I used the Trasko bypass type oil filter prior to the Amsoil EaO filter. Comparing both filters, after 2000 miles the oil became clearer than what was in the bottle. Trasko filter did have flow restriction, it filtered better when in city driving, you would notice the oil becoming more filtered. The EaO filter has no flow restriction and seem to filter in any type of driving condition. Trasko filter last about 10,000 miles max and you would need to change the element out. Kept the oil and engine clean. Comparing with the Amsoil SDF and K&N filter, the Trasko I felt kept the oil cleaner, thus cleaner engine.
I've got about 13,000 miles with the Amsoil 0w-30 which is my 4th run and the oil is still clean with the EaO filter! In fact it's been over 1 year. Judging from the looks of the oil and the oil performance, I feel it would be a waste to change the oil out and will extended it another 5,000 miles.
The filter is worth the cost. I use Amsoil for extended drain intervals..This is the best spin on oil filter I've experienced!