As best I understand this product, it's a little different than the typical solvent based cleaners.
Here's the distinction broken down. ARX, during the application phase, helps break down the undesirable deposits from combustion byproducts such as sludge, coking, and layers of muck that harden seals on rotating parts. ARX does NOT remove these items; it changes their phsyical state and softens them up. Then, during the rinse phase, the regular oil cleans the deposits away with it's detergent package. OTOH, a solvent-based cleaner violently attacks everything in it's reach, including the host oil. The ARX takes a gentle approach, applied over time.
For those who can't seem to resist the alure of "get it done right now", ARX is going leave you wanting more. Nothing can be overstated here; ARX needs time to work it's magic, but when allowed to do it's thing, it is nothing short of a miracle regarding it's design intent. It's resultant effects help restore compression, clean seals to make them pliable again, and increase fuel economy that was previously robbed. You won't see this overnight, but patience with ARX will prove itself out if you allow it. The rinse phase is integral to the whole process; you can't get full benefits from ARX until a proper rinse phase is applied.
Using ARX in a maintenance dose is just as beneficial. Some would question why a maintenance dose is needed, but it should be obvious to those who think it through. The "host" oil will always leave some types of residue, and as they go unchecked, a slow build up begins. If you were to use 3oz of ARX every 5k miles for OCI, a bottle would last 20k miles. During this time, your engine would be operting at peak performance. The alternative would be to wait and do a full 12oz application at 20k miles, but you'd suffer the progressive losses up to that 20k mile mark. So the cash cost of ARX would be the same over that 20k miles, but the cost of lesser fuel economy, poorer power performance, higher emmissions, etc would be nearly zero with a maintenance plan, versus unquestionable losses for a "once in a while" application.
Frank has put significant time and energy into researching, developing, and marketing this product. The ARX webpage is full of good information, including application, rinse and maintenance instructions.
I believe in this product; it is in use in both the engines and transmissions of my Taurus and Villager right now.