Rislone's Engine Treatment Concentrate, No. 4102, helps treat sticky valves and rings, noisy valves and lifters, plugged oil passages and screens and loss of power. This engine treatment accomplishes this by cleaning and lubricating valves, rings, oil passages and screens, which reduces friction and wear.The concentrate combines a penetrating lubrication oil with protective engine additives and cleaning agents. Engine deposits dissolve on contact with the treatment and stay in suspension in the oil until they are trapped in the filter.