I have a 95 12v with 244k still running like a bull, I mix one half gallon MMO to a full tank and have had real go results. No hard starts at 15 below, idles 750-800 seems to keep things lubed nice, pumps valves ect there is a slight MMO smell but it's OK!. I have an ATS manifold does anyone know if they sell the pyro for this manifold it's pretapped.