Just use Mercon ATX (factory spec fluid). Yes, thats right...automatic trans fluid.
Cheaper and I'd trust what came in the car orignally over something else.
Oh... those "Stop Leak" products are temporary... 90% or the time... it will make things worse. I have found that the "stop leak" radiator product does work on TINY pin hole leaks... but everything else is just a "patch". I would put the front of the car on jacks, and slowly turn the wheels back and forth to cycle fluid while having a buddy with a flashlight look under the car by the rack, PS hoses, and pump and look for dripping. Once the fluid is up to temp, it flows easier because (like oil) when the temp rises, it's viscosity gets lower. And before doing so... powerwash the underbody and engine bay so it is clean.. let it dry, and look.