Quaker State high mileage motor oil is also powered by zinc, the heavyweight champion of wear fighters in engines. The boosted zinc anti-wear agents protect the high-temperature and high-wear surfaces at all costs. It?s formulated to support catalytic converters and other emission equipment, making this the fountain of youth for your reliable engine. And we?ve tested it in real-world driving conditions, for hundreds of thousands of miles, to ensure it delivers.