I have an1989 Eldorado, that just recently developed a huge slip in my transmission. I thought I was going to have to spend a great deal money for either a new transmission or have mine rebuilt. With money being an issue right now, I went to my local auto parts store, look though the transmission lubricants, and saw your product on the shelve. It was the most expensive one there. I deliberated for some time, when finally I thought I would give it a chance. It seemed to have an immediate effect on the transmission. The Prolong lubricate as been in for about a month now, and with each week the transmission has only gotten better. I do not know what is in there, but I am a firm believer that it really works. I have since change my mind about spending money on the transmission. I will certainly buy the other engine products that you have.
Thank you
Jay B., Tucson, AZ