PurolatorBOSS^® Oil Filters are the next generation in oil filtration. Featuring our exclusive SmartFUSION™ Technology full synthetic media, PurolatorBOSS provides up to 20,000 miles of engine protection. Engineered to be the ideal match for full synthetic oils, BOSS out performs in the most extreme driving conditions, like towing, hauling, off-roading, stop-and-go traffic, frequent short trips, extreme weather and dusty conditions.