I have read many threads on oil and now I have one of my own. I also use syn. in my GN and want to add a quart of MMO Marvels mystery Oil to my regular oil change. Has anyone ever tried this in their GN motor? Does anyone know if MMO has proper zink to use in our engines? Would it harm anything if added. I know that there is many additives like Lucus, but MMO has been around for a long time, with many good results. Thanks