I purchased a couple of bottles of Auto-RX over the winter and I was extremely pleased with the results.
I used it on a '99 Crown Victoria Police Interceptor. This was a retired cruiser with 100K miles on the odometer (and lots of idle time). Auto-RX did a noticable job of cleaning up.
I also used it on my '95 Lincoln Towncar with 86K miles. This car used about 1 quart of oil per 3K miles. I figured the oil seals needed replacement (this is a common problem on the pre '96 Ford 4.6L engines. After one Auto-RX treatment, the oil consumption went down to less than 1/2 quart per 3500 miles. I'm not sure if Auto-RX somehow conditioned the valve seals or if possibly I had some sticky rings. Either way, I'm impressed with the results..
Thanks for a product that works as advertised.
Cliff Marano