Is it? My recollection, going back to when the product made its initial splash here, and based on an LSJr. video, is that the product was developed to clean the ring area. Over time it seems to have morphed into a product that cleans other areas of the engine, including ridding the engine of varnish.
Was my initial understanding correct, that VRP was for cleaning the ring area? When did it become capable of cleaning varnish? Have there been any tests for that capability? Can anyone point to such a test?
I'm posting this as much to test my memory as to, perhaps, challenge the assertion that VRP cleans areas other than the ring area.