I thought I was doing a good job keeping my engine clean. I have run 3,000 mile OCIs for years untill a couple years ago. Then I switched to a 5,000 mile OCI.
In the past I have changed my own oil, kept up with maintenance, but wasnt really anal about things. Was my car taken care of? Yes.
Was I taking exceptional care of it? Probably better than most people out there.
However, I am on my 2nd Clean phase of Auto RX and am still getting junk out of the engine.
If you run normal dino, or high end syntheic, you are getting the best lubricants mankind has ever developed. Your car will probably go 300,000-500,000 miles and have oodles of other issues when you finally decide to give another model a try.
Believe in Auto RX or not. You are getting some good stuff if all you stick with is SM quality lube.
Will you see an improvement with Auto RX? Perhaps.
Although I don't think most people know enough about their cars to care. It is only when it stops working that they care. However, if you have a problem, or think you do, or that you potentially have a problem with build up or sludge. I think that their is proof that Auto RX will help.
Once you know you have a sludge issue, I dont think their is a Synthetic out there that will do what Auto RX will do. If there is I dont think the members of this board have been exposed to it.