Terry Dyson's report on ARX and LC.
Since I was hired by both companies to test their products I post this with some degree of insight. I am not allowed by proprietary agreement to disclose all I know about each product but here goes what I can.
Frank of Auto-RX may have a valid point but I have not verified the idea that continous use of Auto-Rx in a lower maintenance dose could clean continually. I can say that from our testing to date the product literally is a "liquid filter" that not only cleans but can disperse large and small contaminants in a way that cuts wear and increases ring seal. Ensuring the product is at room temp BEFORE pouring into the host oil ELIMINATES cold weather issues, once installed in the host oil cold start,pump is not impacted.
LC is more of a anti-oxidant booster with a unique Cf reduction capability using a chemistry that is unlike Auto-RX, both chemistries are unique, NO ONE ( other companies), have access to.
In nearly 60 years of continous use, LC is a rock solid chemistry but WILL not CLEAN deeply like Auto-RX.
The ester chemistry of RX is totally antithetical to LC.
Many of my oil analysis customers use BOTH products at the same time, verifying that application with oil analysis. This does not work in every application and for cleaning phase there is no need for LC top ups.
LC is as safe as motor oil, and Auto-RX is as safe as a consumable food stuff so they can be compatible but do not attempt that without verifying oil analysis. Both companies will not be happy for me to post that here but there are those doing it , successfully. Warning!! Don't do it without testing and don't blame either company if you screw up something experimenting on your own!
Marketing takes second seat to my desire to share science here. So, I say with a great degree of confidence: use both products as directed and enjoy your engine running better while saving money on needless additives or overpriced fully formulated lubes that will still need a periodic Auto-RX cleaning and anti oxidation help from LC.
Both products are effective chemical correction tools for us as a oil analysis company. Used properly save time and money.