Topic states it. I will be using AutoRX as soon as I can find a break in the solo season (or a co-driver). I'm really not that comfortable having an autoRX cycle while continually driving at over 4500 RPM. But I'm still curious as to how much this oil will clean. Previous three oils used: Mobil Drive clean 10w-40: short change intervals, got pretty dirty after 3-4 events and daily driving. Valvo VR1 20w-50: short change intervals, 4-5 events only (bought a beater). Not black looking, but I would develop a ticking lifter after a few events. Valvo max life 10w-30: Dec to Feb. Mostly highway driving (2k miles). a few ice races. Came out looking pretty good and smelling clean. After running the max life I now always have a ticking lifter, although you can't hear it with the hood closed. Looking through the oil cap it looks pretty dirty, brown and black.