FRAM Tough Guard Oil Filters are engineered with a blend of cellulose and synthetic media to provide an outstanding 99% dirt-trapping efficiency. The silicone anti-drain back valve is designed to hold oil in the filter to ensure safe start-up and engine protection for extended drain intervals. Proven protection for up to 15,000 miles Engineered for use with premium conventional and semi-synthetic oil Ideal balance of dirt trapping efficiency and dirt holding capacity 99% dirt-trapping efficiency It has an internally lubricated sealing gasket for easier filter removal.