Motorcraft fuel filters must also withstand harsh performance testing through a series of test-to-failure endurance and materials durability tests to ensure their long lasting quality and operation; such as extreme temperatures (-40 to 250 degrees F), leak resistance Under extreme pressure, corrosion resistance, flow restriction resistance and more. Motorcraft fuel filters undergo a punishing regimen of additional tests to ensure they meet strict Ford original equipment quality, performance and durability standards, including key life testing to the equivalent of 10-Years/150, 000 miles for passenger cars and light trucks.