Royal Purple® HMX® is specifically formulated with robust zinc and phosphorous anti-wear additives and Royal Purple's proprietary Synerlec® additive technology to minimize wear and restore lost engine performance. HMX is chemically enhanced to revitalize hardened seals reducing oil consumption common in higher mileage engines. Heavy duty detergents remove engine deposits and maintain cleanliness promoting engine longevity. Royal Purple's advanced Synerlec technology provides exceptional film strength by reducing friction for maximum engine performance. Synerlec also provides excellent oxidation resistance to safely extend oil drains, and an ionic attraction to the metallic components that maintain an oil film on the parts, minimizing starting wear. The Royal Purple Oil Filter features 100% synthetic microglass media for superior particle removal with a filtration efficiency of 99% at 25 microns. This product is designed with a high performance silicone anti-drain back valve that prevents dry starts, even in extreme conditions and an extra resistant rubber base gasket that guarantees a leak-free seal. The Royal Purple Oil Filter also provides an ultra-tough filter housing that can withstand higher burst strength than conventional filters. Royal Purple filters are fully compatible with all synthetic and conventional oils