I did 6 ounces of auto-rx in my Mercury Marauder's transmission, I recently changed all of the fluid out and put on a new trans filter. The transmission is shifting fantastic.
The trans fluid that came out was a dark burgundy color, proving that auto-rx works on a low mileage transmission.
I changed the trans filter and fluid on my Dad's car, same car as mine, he is at 30,000 miles too, he did not want to do auto-rx in his transmission. His fluid came out looking brand spanking new.
I saved the old trans fluid from both cars in case anyone was interested in seeing some pics of the fluid from both cars.
Frank once told me that contaniments build up in your cars engine and transmission within the 1st 25,000 miles, and my observations show that Frank is 100% correct.