The Frantz Duramax Oil Bypass Kit is a highly efficiency bypass filter; that can help increase engine life over time; reduces engine wear by removing particles ranging from 2 to 20 microns The oil bypass filter system features extended drain intervals; longer intervals are easier on your engine and increase the number of months and miles you can go before you need an oil change The Duramax bypass oil filter kit saves you hard earned cash spent on oil changes by extending regular preventive maintenance intervals The diesel bypass oil filter system provides superior filtering and cooling The Frantz Filter delivers an endless supply of pure oil for Duramax engines