Motorcraft oil filters are engineered to help screen out abrasives to help meet today's longer service intervals. Why Buy: -Tested and retested under extreme conditions, Motorcraft filters are also the only filters recommended for Ford, Lincoln and Mercury vehicles. -Helps protect against engine wear by screening out abrasives, such as carbon, sand, dust and bits of metal 80% efficiency on particles 20 microns and larger. -Cellulose and polyester blend media is formulated for high capacity and strength. -Pressure-relief valves also help maintain the supply of oil to the engine under extreme cold conditions or if the filter gets clogged. -Location of pressure-relief valves helps minimize the chance of contaminated oil circulating back into the engine. -Steel cases are ironed for a precise fit, fluted to ease removal and painted to resist rust. -Anti-drain back valves made of silicone provide greater cold/heat resistance.