Does any of this stuff really work? Or is it just a bunch of bull. Went to the local auto store today and just happen to glance at some of the stuff they had on the shelf. Never used any of them. I'm very skeptical about these kind of stuff. The cost of these items are kindy pricey also. For the amount that you would pay, you'd figure that this stuff really works. Anybody with good/bad experiences with any of the above mentioned? I might give the Prolong Automatic Transmission Treatment a try. Just got my tranny fluid completely flushed @ 50k and thinking about adding some additives to help with lubrication & prolong the life of the tranny. Any thoughts?