WIX Premium Panel Air Filters provide excellent engine protection for normal and severe driving conditions such as stop and go traffic, dirt roads, construction sites, short trips, and interstate travel. WIX filters are recommended for OEM air filter change intervals. These filters contain 30% more media than OES filters and use a phenolic resin treated enhanced cellulose media which provides excellent durability against moisture ingestion. When applicable, the high-tear strength polyurethane seal survives extreme hot and cold temperature conditions. Air filter Laboratory Tests per ISO 5011 at least 99.5% efficiency (Based on Wix 42389)