Frank,
Let me add that, as I said above (Friday post), looking down the filler hole is probably not a good way to determine whether a cleaner has worked. So I really don't know what amount of cleaning anything has done. Best I can recall the dipstick never was dirty, but the treatment was several years ago.
Anyway, I have a question on seal conditioning with AutoRx. I used some in the power steering of my truck and it seemed to stop the leak, then I changed out to fresh fluid and the leak came back (I since replaced the seal). But the Aerostar has a leak in the steering rack, a small one. I might try AutoRx for that. Can't hurt, may help. But would it be better to add the AutoRx and just leave it there? I don't want the leak to come back.
Also, since I have no idea the capacity of the steering system, I'll guess two quarts, which is probably more than it really is, and put in two oz AutoRx. Will that be a problem to get too much AutoRx in it?