John Yeager uses Lucas Power Steering Stop Leak in 1999 Ford Superduty F-250

my 1999 ford superdurty has 122,000 miles. Not to long ago the power steering pump started whining like it out of oil I thought Iwas going to have to replace it. So I called my mechanic and he suggested the lucas power steering additive 50 miles later its making no noise at all and it turns alot easier. now I use your fuel products to plus I'm using your engine oil additive in my truck and my wifes car