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Royal Purple HMX High-Mileage Motor Oil

4.97 out of 5 stars 175 Customer Reviews

Royal Purple HMX high-mileage motor oil is specially formulated with robust zinc/phosphorous anti-wear additives and proprietary Synerlec technology to minimize agi

Royal Purple HMX high-mileage motor oil is specially formulated with robust zinc/phosphorous anti-wear additives and proprietary Synerlec technology to minimize aging and restore lost engine performance. It's chemically-enhanced to revitalize hardened seals, thereby reducing oil consumption common in higher mileage engines. Stout detergents remove engine deposits and maintain cleanliness to promote engine longevity. Royal Purple's advanced Synerlec technology provides exceptional film strength, which lessens friction for peak engine performance. HMX high-mileage motor oil offers outstanding oxidation resistance to sa

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