Valvoline VV150 MaxLife SAE 10W-40 High Mileage Motor Oil - 1 Quart Bottle (Case of 12) 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 Anti-wear agents help prevent engine damage