ProTecta High Mileage Synthetic Formula is designed for vehicles having more than 50,000 miles and SFR or ProTecta products have not been used regularly. High mileage vehicles accumulate deposits that create sludge, causing oil consumption and unsightly smoke. In addition seals can become hard and brittle and leak on to the ground. ProTecta High Mileage Synthetic Formula consists of a highly concentrated detergent/dispersant and anti-wear booster package to clean deposits and reduce wear, thus extending the life of your engine. Protecta conditions seals to prevent leaks.