Royal Purple (11749-3PK) HMX SAE 5W-30 High-Mileage Synthetic Motor Oil - 5 Quart, (Case of 3) Specifically designed to minimize wear and restore lost performance in engines with more than 75,000 miles Formulated with robust zinc/phosphorus anti-wear compounds combined with Royal Purple's proprietary additive technology HMX is chemically enhanced to revitalize hardened seals, reducing oil consumption common in high-mileage engines Reduces friction and metal-to-metal contact for peak engine performance Also provides outstanding oxidation resistance to safely extend oil drain intervals, and an ionic attraction to metal surfaces, providing protection and minimizing wear at start-up