Pennzoil high mileage motor oil helps clean out the sludge lesser oils leave behind, while helping to reduce leaks and oil consumption in worn or higher mileage engines. Pennzoil high mileage motor oil is a Pennzoil conventional motor oil that has been enhanced with a unique combination of special conditioning agents and additives to help stop leaks from seals and reduce the oil consumption that is typical of older, worn engines. It's a high mileage oil specifically designed for new or late model vehicles with over 75,000 miles, with the mission of keeping engines running clean and going strong.