Ihave no idea of what your talking about price is the same since Auto-Rx is the same chemistry. Only the rato of Auto-Rx to differen,t oil viscositys change.
Auto-Rx is undergoing testing on a regular basis and there will be other changes in application i am sure.
Thats why Auto-Rx continues to work better. When we make proven changes Auto-Rx customers don,t have to throw away product,just impliment whats new.