Rislone High Mileage Power Steering Stop Whine with Leak Repair contains a special blend of viscosity improvers, anti-wear friction modifiers and extreme pressure performance additives to solve most power steering problems. These additives fix hard steering, reduce friction, control temperature, stop noise & whining and repair minor leaks. Excellent to use as a preventative maintenance product. Use to top off existing fluid when low or add a bottle when changing fluid.