The Amsoil filter is 98.7% efficient to 15 microns. At 80% it will filter down to 1 micron. This plus the fact it has a much great load capacity, they rate the new motorcycle filters at twice the manufacturers recommended change interval or once a year. The old Amsoil filter was only rated at 6,000 miles or 6 months.

Tom

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)