Let me begin by saying that I was a mechanic for over thirty years, and my mechanical background makes me very leary of the "Snake-Oil" claims made by your company as well as most others. Being an avid motorsports fan, I have seen many Lucas commercials on TV. Recently the power steering pump on my wife's Taurus began that tell-tale whine, checked it and it was low on fluid. I added fluid and the whine disappeared- FOR 2 Days. Not wanting to change the pump, I am now 65, I thought "what the heck, I'll try some Lucas stop-leak treatment. GREAT GUNS, IT WORKED> No squeels- - No leaks. Thanks Lucas for a product that works and thanks for supporting motorsports.