Purolator PBL15313 PurolatorBOSS Premium Oil Filter Up to 15,000 miles; 99% Dirt Removal Power SmartFUSION Technology featuring a reinforced polymer mesh backing for expanded dirt holding capacity Silicone anti-drainback valve for long-life and protection against dry starts PuroSEAL Gasket made from ethylene-acrylic for superior leak protection and life expectancy BOSS Steel Casing provides stability for greater resistance against extreme pressure while metal end-caps enhance durability