There is very minimal overlap betwen the products as they relate to an oil treatment. In that application, ARX is the far more effective of the two at deep cleaning the crankcase and valvetrain mechanicals.
But I think SF does a great job at combustion chamber cleaning when fed through a vacuum inlet. ARX really can't do this (beyond cleaning the ring packs, which depending on philosophy may or may not be part of the "combustion chamber").
You can use SF as a fuel additive, but there are more effective injector cleaning products now available, such as Techron and Regane. No way would you put ARX in a gas tank.
I have never considered putting SF into an auto trans or PS system, whereas ARX can work well in these systems.
When I think of SF, I think of direct-fed combustion chamber cleaning; when I think of ARX I think of slow, deep crankcase cleaning and sludge removal. That's where each shines in my experience.
But I think SF does a great job at combustion chamber cleaning when fed through a vacuum inlet. ARX really can't do this (beyond cleaning the ring packs, which depending on philosophy may or may not be part of the "combustion chamber").
You can use SF as a fuel additive, but there are more effective injector cleaning products now available, such as Techron and Regane. No way would you put ARX in a gas tank.
I have never considered putting SF into an auto trans or PS system, whereas ARX can work well in these systems.
When I think of SF, I think of direct-fed combustion chamber cleaning; when I think of ARX I think of slow, deep crankcase cleaning and sludge removal. That's where each shines in my experience.