WIX XP Oil Filters provide robust engine protection when using synthetic motor oil for harsh driving conditions such as towing, extreme idle time, lower gear mountainous climbs, long periods at highway speeds. WIX XP filters are recommended for OEM oil and filter change intervals, typically 3,750 to 10,000 miles. This filter traps up to 100% more dirt and contaminants than WIX to resist premature plugging due to oil breakdown. Fully synthetic media withstands the harsh oil temperatures and conditions. A specifically formulated HNBR gasket provides an excellent seal during extreme cold engine starts and resist hardening under elevated oil temperatures. When applicable, WIX XP silicone antidrain back valve protects against dry starts past the traditional filter change interval. Oil Filter Laboratory Test Performance per ISO 454812 32 grams dirt (51515XP), 99% efficient at 35 microns (Based on 51515XP 51356XP, 57060XP)