High mileage motor oil is designed to extend the life of higher mileage vehicles. If you drive an above-average amount of miles in your vehicle, your engine requires a special formula that is found in high mileage oil that helps fight the four major causes of engine breakdown: leaks, deposits, sludge and friction. Engine breakdown is a greater risk when you demand more from your engine. Higher mileage motor oil lasts longer and provides your engine with the added protection it needs so you can keep your engine running smoothly. MaxLife's approach to maximize engine life:Special seal conditioners rejuvenate seals within the engine block to help prevent oil leaks that lead to sludge and deposits, Anti-oxidant additives reduce oil viscosity breakdown to help prevent engine-clogging sludge and deposit formation, Detergents chemically bond with and remove existing sludge and deposits, Additional friction-reducing additives help reduce abrasion within engine, and Anti-wear agents help prevent engine damage.