Since I’d been experiencing some moaning and groaning from the power steering pumps in both the Impreza and the Explorer, I topped off both reservoirs with Lucas Power Steering Stop Leak. After idleing for a few minutes, all strange noises went away. I’m highly impressed. The Explorer is now silky smooth and it’s like driving a whole new truck! Good stuff! I can’t wait to see how the steering on the Impreza feels at Team O’Neil Rally School this weekend.