When they test the filters for full capacity over 12k+ miles, or about 200 hours of steady highway use equivalent, instead of packing it into four hours use, then I will put some weight to differences in %. Oil circulating through the filter for fifty four hour tests is not the same as circulating through one four hour test. In real life a filter isn't usually clogged in four hours use, or about 250 miles on the highway at 60 mph.