Green High Performance Air Filters come pretreated with a specially formulated dirt-trapping oil. Our proprietary lightweight, synthetic Green Filter oil is designed to not damage any vehicle sensors.
This oil creates a positive (+) magnetic charge, or ionic bond, with the filter's stainless steel mesh. The positive charge attracts the negatively (-) charged dust particles entering the filter, causing them to cling to the steel mesh and allowing the cotton to remain clear for maximum air flow.
Green Filter oil also contains a swelling additive for the cotton filtration media. This causes the cotton fibers to swell, which allows the filtration media to collect the very small dirt particles (down to 5 microns) that could otherwise harm your engine.