99-11312The only oil designed specifically for K&N filtersSpecially formulated to improve air filter performanceQuickly penetrates and saturates the filter pleatsOne 1/2 ounce pillow packK&N 99-11312 is a 1/2 ounce pillow pack of air filter oil. K&N Air Filter Oil is the only oil specially formulated to work in combination with the cotton fabric in K&N air filter elements providing a superior air filtration system. When used as directed, it quickly penetrates the filter pleats, where it remains suspended in the cotton fabric. Saturation is maintained until the element is cleaned with K&N Air Filter Cleaner.