Royal Purple® HMX® High Mileage Motor Oil is engineered for engines with over 75,000 miles, using a powerful combination of high zinc/phosphorus anti-wear additives and proprietary Synerlec® technology to fight wear, restore performance, and reduce oil consumption.

Unlike conventional oils, HMX is chemically enhanced to revitalize hardened engine seals, cut down on leaks, and clean up sludge left behind by lower-grade lubricants. The result? Improved engine longevity, restored responsiveness, and peace of mind for drivers who want to keep their vehicle running stronger, longer.