I use the Amsoil oil filter on both of my bikes. It is rated at 15 microns at 97.3% efficiency and 10 microns at 80% efficiency. Like the oil is it rated for 12,000 miles or 1 year.

Those who would give up essential liberty to purchase a little temporary safety deserve neither liberty nor safety. Benjamin Franklin, US author, diplomat, inventor, physicist, politician, & printer (1706 - 1790)