Bel-Ray Fiber Filter Oil - 400ml (13.5oz.) 99170-A400W (1) Aerosol lubricant that was specifically developed for superior performance with all fiber/gauze type air filters Superior trapping element needed to obtain maximum efficiency from todays fiber/gauze type air filters Traps and holds contaminants, will not gum or clog and does not restrict air flow Water resistant lubricant and will not run off