I used a bottle of the Lucas Power Steering Stop Leak in my old ’73 Mustang and I must say it sealed up the leak quite well. The power steering feels smoother with less slop as well. The engine is getting a bit tired and I don't know what to do about that. Having seen the Hyper Lube, Motor Honey, and STP oil stabilizers on the auto parts store shelves for years....it makes me wonder, what does Lucas Oil Stabilizer have that these others don't? They seem to all just be polymers/oil viscosity thickeners. Anyway, thanks for a fine power steering additive.