I spent some time doing a search on this.
MolaKule is a long time member here......check his profile and you will see that he is very well educated on the subject at hand.
If you want LOTS of educational reading, from his profile....click on "posts by".
He stated in a post that I had read quite some time ago that Auto-RX in a maintenance dose with Redline oils is still helpful.
This post from 2003 explains why.
Subject: Re: How Well Does Redline Clean?
The synthetic esters in Redline are polar, meaning they attract themselves to metal surfaces.
Synthetic esters such as POE's are naturally cleaning chemicals. For Redline, the formulated oils do not need to have as much detergent/dispersant additives since the base oil esters do their share of cleaning.
Now the natural esters in Auto-Rx have a greater affinity for carbon and sludge particles than do the esters in Redline.
Note, I read a number of posts by MolaKule that echo the instructions on the Auto-Rx website about using "dyno" oil for both the cleaning AND rinse phase......so CONTINUE what you are doing as per the instructions on the Auto-RX website.
I also asked Frank, the "Auto-Rx guy" about using Auto-Rx in a maintenance dose with Redline and he also stated that it would be helpful.
In this case, I believe the information in this older posts is STILL accurate and relevent now.
However, use care when reading older posts as motor oil is a moving target.....formulations change and some information from older posts will not be accurate today.
Another GREAT thing about Red Line Oil......if you visit their website, you can ask them specific questions about your application and they are very helpful.
As a side note, where I really noticed a improvement with Auto-Rx was when I used it in my automatic transmission (again, follow the automatic transmission instructions on the Auto-Rx website).