Rislone ring seal is formulated to help stop exhaust smoke, reduce oil burning and prevent plug fouling caused by blow-by. Blow -by is usually causes by gaps in internal engine parts resulting from excess wear. Ring seal contains viscosity improver's that thicken the oil film filling these gaps. Rislone ring seal contains high-shear polymers which provide a seal for worn pistons & rings to stop blow-by. Cushions and coats engine parts helping to reduce wear and quiet noisy lifters. Retains oil flow characteristics in hot and cold weather and works with all gasoline and diesel engines using conventional, high mileage and synthetic oil.